Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1ba4f0afdd58a6…

MALICIOUS

PDF

80.0 KB Created: 2021-09-06 09:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: add815d0d6f095a217f3112bb56ea639 SHA-1: a71aebefbb1e66cb9d0e31cec8b0ef7862cabc9c SHA-256: 4c1ba4f0afdd58a611a73ca61ffd98e19c6756e673c3ee4ba3e1c8af076bea30
154 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, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6920

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://livelyway.com/ckfinder/userfiles/files/guzovejetemipisisigizota.pdf In PDF document text
    • http://bagiez.com/userfiles/file/73732756557.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/lemezil.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/8815b7d047c0744ac1a8d90698821c72/pabojubepuwosirifafiwuleg.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/4eb120b2b27415f4073e9dca630f81fc/guxigamaxigidul.pdfIn PDF document text
    • https://menu2uplus.com/images/file/lufodixefedinavasafeja.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/zaladabojifivurerekefil.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/jexutoranazivim.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/24699942350.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/sikorusevemiwogojigak.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c639303c6---kigirufinifiwifoxovina.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8efd91b23---wejoporajerik.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/c6a23aa11eeddf296655c7eeb37f8fe6/xotezuxuwabaxaxiguga.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/68401b13479b62fd4daaf608251e5ed4/pipize.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/653d02e718868e9c9c0668429b8bea34/zidoxojadizudulumax.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160913ddd69aa3---67478543530.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//mekufamepunu.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdbc0d50bda---56412729651.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/toziritumodijubuzogixosu.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160788c3137838---1482862288.pdfIn PDF document text
    • https://asi-filter.pl/files/file/61514692592.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a41247b8d51---71728713933.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=simultaneous+linear+equations+worksheet+docPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001273e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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