Malicious PDF — malware analysis report

Static analysis result for SHA-256 3425ddca5940cbca…

MALICIOUS

PDF

79.6 KB Created: 2021-09-06 02:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 084ed3536897c6716c04621544fad4f2 SHA-1: 80cbe20a9a45d988cabc49f6ec5ad30a955e2862 SHA-256: 3425ddca5940cbca8144c064e35f098981493c3df9f988c3453f68445f589a34
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of embedded URLs and the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5648

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://archinfo.ru/uploads/file/fetebotipexurajuze.pdf In PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c730446f433---jozidovika.pdfIn PDF document text
    • http://wenxuezj.com/images/File/vadadifunulazujog.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3f76a5c9d---nozuxojutidom.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/0uea4cp6m0728sp60202cm59g6/4661587443.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/8143dc456ad7106facd3e7290b18f273/30217574434.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/10c6fad0404271aa683aa6135293835d/70546984512.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/6193e5020640a3303f6bfd5265ecee2e/54422970603.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/derumipumiwomunolemisa.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/95168857655.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/79449125629.pdfIn PDF document text
    • https://xistenze.com/files/files/49766622056.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b26a313f2---66684792553.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210725150107_ph5jo4.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/27250487215.pdfIn PDF document text
    • https://matfreklam.com/calisma2/files/uploads/kelisij.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/15333286827.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/gaxanetevobomomeripezego.pdfIn PDF document text
    • https://www.retake.dk/ckfinder/userfiles/files/wejogolozuvakimoxofuwo.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092abd89dde8---1453017258.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/6ad902a339343f2924126155d9cc3635/rogujet.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd7b0435a1---kurefiwanovifedimipe.pdfIn PDF document text
    • http://land89.com/ckupload/files/74836684577.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=spatial+planning+case+study+pdfPDF link annotation
    • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001008d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008D 18792 bytes
SHA-256: de72059b8ef17fc905df7fe415563be6882bfb02713b1a32f069bdf83c9a3517

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