Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14f1723b3aaf67a…

MALICIOUS

PDF

95.1 KB Created: 2021-08-22 02:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c0eb093914bdeb790f555275c25d1bc3 SHA-1: 92068fb8aedaecde1c82653fc4af2935198f5206 SHA-256: d14f1723b3aaf67a16fe0455c6582ae2b0a41c9ec5698f6b1639c035785c2d1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious destinations. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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 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 https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/eedbae642923244ec46b9ca66bd19449/71065214378.pdf In PDF document text
    • http://djapm.com/userfiles/file/vaxeju.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/zigaxoxorixofobama.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/nofokifegedofifili.pdfIn PDF document text
    • http://bjallstar.com/upload/file/97505210487.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23776184084.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c66a5a6c758---19848527356.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/71481063898.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/wenufeduwarivomataxu.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cf791612642---fexebokenadapasogosifiv.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/72966219286.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/xovujeru.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/xelokusifapugelosup.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/4e912922c4a40a7c56f9855dd87d0dbe/sadasivumawe.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/lerewejaxidukajatidikat.pdfIn PDF document text
    • https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/gobifaborom.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/pm8cac1voi8dfta2eqb3ptdpl6/30876775379.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/satavawu.pdfIn PDF document text
    • http://eastwoodfamily.net/userimages/mebodosesigamarodo.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/luwojegabosiki.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/21642844247.pdfIn PDF document text
    • http://qlionshousing.ca/userfiles/file/78271730394.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16086727628df3---rilopexagekonuromovok.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/d201d05ca62ef55a63c1500b94b967ea/74970875529.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/23097025888.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=forming+ionic+compounds+worksheet+answer+keyPDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF848 11284 bytes
SHA-256: 3d000a6cd767fc92d68fd05c200ea0fffcf608d6ed88422342659f8b12ab4963
font_01_sfnt_off00011277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11277 17308 bytes
SHA-256: 799aa1d0971373af06586a70091660100f3ca642edb1c4ff273b2d0598dc1672
font_02_sfnt_off00013f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000157a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157A8 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b