Malicious PDF — malware analysis report

Static analysis result for SHA-256 820e2cdb44d94b19…

MALICIOUS

PDF

233.2 KB Created: 2021-07-03 11:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 615f803c7c4221b3e79eed14d308d6c9 SHA-1: ae62b43753b4d07db36a74c69d18dc2898047e98 SHA-256: 820e2cdb44d94b1934841372ea3fd6b5c17eb0d19084446e25965cfbbbdffe3d
286 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV, indicating it likely serves as a phishing or trojan delivery mechanism. It contains numerous links pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The embedded PDF artifacts also show suspicious findings, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.1380

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE
    A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608298c755809---rigagobowifisap.pdf In PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d20bf3e9a9---semukuvoxuwetarupev.pdfIn PDF document text
    • http://apricomm.com/userData/board/file/6986968279.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cde9bbe53---tulodefeviputitefijukup.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/2a86eb23a92c8789cba8c367ee339275/11000896703.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/20362113659.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/17484913843.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/24538914649.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/fozusinujutasekadejoz.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d452d8f9e0---votan.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/ffhit8fmdfbea18nk1iqkf09mf/virapejet.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f87411938---relimujorumupukasa.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/36666614100.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/reboluxixadexusezozib.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/0f420538e0edf48f545c7bf928ebc02b/tekovuxafigudawuv.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/pbcq2g63c17f3hllpr7q8n7qd0/72159135728.pdfIn PDF document text
    • https://alutat.com/data/file/femejop.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/57326867658.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/bobatevavigoluzuvi.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607815f10a35d---tojotamurugi.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc054fbc251---jotekozisikoworidolevixe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+put+multiple+pictures+on+word+documentPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607502b6981ea---47483578984.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF42 10688 bytes
SHA-256: cfb2b0b5b5453fbc3fb76a1687a284536d87f1c65df6b4f5fc0a6fef8549a34d
font_01_sfnt_off0000e7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCF 16820 bytes
SHA-256: 1a7cfabbd172c0a6d3745816ea524fe38d24fdda83dca03185b49b4f23dad5b4
polyglot_child_pdf_off00013632.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x13632 159421 bytes
SHA-256: 2b0ea74df111dfcd2799ea54feb2ed58b069d0e53c2d9b69a5c62792c4d0a0ba
Detection
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Obfuscation or payload: unlikely
polyglot_child_pdf_off00026c64.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x26C64 80011 bytes
SHA-256: dc2fadd608b08e3852963b38376fdd17bf259248b74d76f661653d6af3fbbcaa
Detection
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.