Malicious PDF — malware analysis report

Static analysis result for SHA-256 f607b6a056a88328…

MALICIOUS

PDF

39.7 KB Created: 2021-06-23 15:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2e2c75fc458f3b805a7cd69dbb8f20a3 SHA-1: 905292fde82a99ea399c79fc8a3f1b4cbff4a3ad SHA-256: f607b6a056a88328d2c6b900c707d367e98efa484098874349bbdf3b1513b275
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9146

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://smidgel.ru/uplcv?utm_term=mio+alpha+manual+pdf PDF link annotation
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/1da53e13bf5aed7ff9ba6f6a1914e4a5/16684572370.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/e6728092adbcc02f438007d60fe29904/supenakuj.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/didapexuvonodi.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/d80f878562920f5791735dae732afb34/sewuvixuvutivo.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/xifokovig.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab57ed6b6ac---93202781360.pdfIn PDF document text
    • https://service-panev.com/userfiles/getatisorifadewedol.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/6ec2d401dee1528ddb0f625867d3be03/33016288431.pdfIn PDF document text
    • https://t2sc.me/userfiles/12005177139.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609edc49e5616---30080151952.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/e09811196785f97ebc21176edd5bd62d/jurubeseguwupamuvuruxani.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/291214524918.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16085e8dcefca3---tazokiw.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/figuvobekokuvovewawuja.pdfIn PDF document text
    • https://antae.be/app/webroot/uploads/file/78813402219.pdfIn PDF document text
    • https://takiminsahaIn PDF document text

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