Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea60c2c37a6ffbfc…

MALICIOUS

PDF

100.8 KB Created: 2021-07-18 15:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 463a33047facdb21e48bc8c33b626e93 SHA-1: 3c74e8dbcbcc44788902d222657e1db8fbc0d258 SHA-256: ea60c2c37a6ffbfc723f65eea8b3df0017813e55243ca4d0867257735bda1627
196 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites utilizing super-forms, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of 'LOLBin token sequence in document text' heuristic further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://micast.de/wp-content/plugins/super-forms/uploads/php/files/n9rl5251t6p5ph1bnp6sbi7p94/xabefibosus.pdf In PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ab8214189---53901355838.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/13d032d40bc068f73b1ef78ea614b106/jesitiwitolikebego.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/repuvipokinom.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/be845dde3ae4ed1187d359a4ed0ed579/61269607047.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/danopedisujubik.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/888624fde69a87df3a808dfd21b7e71b/senuzojadewapapala.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/laxosa.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/95176312350.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/20a23b09ce47bc7b07a34e4d85da7069/zerulegeburemadoxe.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/8002e0fc01d6792fabd13b3e530b1cda/64455026897.pdfIn PDF document text
    • http://air-ned.com/uploads/files/moforadifizuvuwejiwoboz.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716b985e9db---63915886880.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/89109b6231d10553af28d5e5eec902aa/tebiwukawidegixupobirope.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/xuxoxafeluwe.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/i9qum9f5kh8hvo4bib2omdvge0/pekukumejamexeve.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8fc593f91---wabijuxiwo.pdfIn PDF document text
    • https://harom.ro/files/file/basaseven.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/ec6f7234aff6f160c4a83dd85a901ed5/madatub.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/napokevej.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/b9472eb1c27e53ce95be3e350d05c5dc/99817380119.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-6-26/20210626213152115597.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/61043087987.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/In macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=1950s+hairstyles+for+curly+hairPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/58659119470.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000127e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF5 16996 bytes
SHA-256: 016d2fcf4273202646db8fd58c59a3321c7ee7b804cb64e1c1b21f2a6b76f755
font_02_sfnt_off00016c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C36 10920 bytes
SHA-256: 3702ccd56c21471ad4307d3f3c17ffd0ceab7213db7d8a8a886673041f1b560f

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