Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6d54beaef86908…

MALICIOUS

PDF

85.3 KB Created: 2021-07-14 04:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 04fcb82c5d181ee0d7b0c7ffc0327721 SHA-1: 09407593306545cdae6d98de13f17e1792f55bb0 SHA-256: df6d54beaef869081e09998444db1758284b696055e4d5d9f5c5b784ec706060
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate that the primary goal is to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://canphantich.net/Images_upload/files/faxoroz.pdf In PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160d8b1bd54bf9---vusimikifaxevuzubudeta.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/159475d02479474deb169b5456deda2f/6664243778.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/d521qh0s35q3iacom7v8bi73q5/xabalaguzi.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/fotesixujaf.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/hs756qk5evo6dhk74k48tl9p86/junonuvunisunexakuxur.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/31977970717.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/6904422511.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afce2ec5de8---sazek.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/vomuxoge.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/zodugewowawemamulutif.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/lumalese.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/45604074573.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5709cc881---motatujerimawixopep.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/a35832c3a1ae52286b60c6846ab3e06e/meguvamuxuxuduvuturumi.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1484c5afb---63632760125.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/60790334479.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073082c27077---35416022141.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/a5595137e126090cfd3b71da07118e08/dixovawajokixu.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/gefoniwidozivip.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/dd518fdc07387a65d86dd16d34c02d51/29187467382.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=numpy+sum+two+arraysPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE842 10316 bytes
SHA-256: e6b9c89a56f7e05fde90b35905c51a15419a53a15bab67cf3c16e6f97d538afb
font_01_sfnt_off0000ffa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA5 17764 bytes
SHA-256: 045f860cf6edd4ef078115784c9bcc1ea8ea0aebd2dbb9a3a57f286b9150ce13
font_02_sfnt_off00012eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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