Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec36ca554b2181e…

MALICIOUS

PDF

95.5 KB Created: 2021-07-21 12:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7a8e0b8cc17067f537d9c263bb103400 SHA-1: d9b5d1402001b030e1733e2b5ac930817d30613c SHA-256: 9ec36ca554b2181e894343521b806aa397c962f4bb4caa0149cffde0d5d9d3c9
196 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, and heuristics indicate it is an advance-fee scam lure. It contains numerous links to PDFs hosted on compromised CMS upload storage and disposable hosting, suggesting it is part of a link farm designed to distribute malicious content. The document body was unreadable, but the heuristics strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ee60ed42eee---gunufefiresiwimiwupidan.pdf In PDF document text
    • http://orsini-blasioli.it/userfiles/files/46531126390.pdfIn PDF document text
    • http://kodemari.info/data/files/robifilazotake.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/jebogezidiwarulowulor.pdfIn PDF document text
    • http://ahchala.com/img/file/pofabutilewagubuvi.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/b3abbeb9eb399122bbf5a675a0af05df/67646146283.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f241b378fe6---vujipisodena.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/44039696221.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/e15c0ab2f7f3b7b21e0d015c1cd32112/menixuwobiridewize.pdfIn PDF document text
    • http://innotack.com/userfiles/files/nilekug.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/962354b3e44477e207a7afd0cc7346a1/41184730961.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/2978e534342f603be8544971a6f97998/93979013470.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/42306671625.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/qtf3b7jrt1ku29b1um5luc9hhs/zuzuxela.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/matowibit.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/ngeqmnp8mpms7ql8r9r04rkdhm/78995088182.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/nifafujapepazexo.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/22804825448.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/291520059259.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e256de95aa4---rarisaw.pdfIn PDF document text
    • http://bensonhigh67.com/clients/55910/File/8526496086.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=what+is+the+collective+noun+for+policemenPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001126a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A81 10904 bytes
SHA-256: 9b3b9d4b15289be62f44c3649683567a13a6552411c3cf2aec7033ecec3772ec
font_02_sfnt_off00014394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14394 17380 bytes
SHA-256: d9cb9c35127f723ea5e93f8ef78fa3f815d85257f5c21dc9e577a109bca723e8

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