Malicious PDF — malware analysis report

Static analysis result for SHA-256 de85074dc6ce182a…

MALICIOUS

PDF

42.9 KB Created: 2021-09-06 16:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 63e928e58c88f9d59bbda6f6a2377cb3 SHA-1: ecb3bba9002f2dca7dd3bd1605843aaa5e30f0fc SHA-256: de85074dc6ce182a0c9e44cda96410e74f1dbf38e069a85d5c6289ce0e8f20c3
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 0.7092

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 1 text block(s), carries a click-outward action, and is only 42 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://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f79fed94007.pdf In PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f42e00dc3---642982329.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/kupezuvikagivufokuso.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/53933895182.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/tekimadavixabul.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92da021eb2---xegip.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/85788108411.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/291815f065d93c1b3a9a143ae134b730/78639965840.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/masakoju.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/lapujaxonuzibodajo.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/34bbeb86f07c722e7a68cc6cc6ad1749/simasopadunulomesiveme.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/156b1a0e45f50576cc8e34f846221ee3/fitirijata.pdfIn PDF document text
    • https://parfumzone.ro/files/file/sometufefetesaxipe.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/xofudiw.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/rapififawisifa.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/e5b73ff6c9f0c852c035171eda62441c/77906519438.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29fe618bf7---19535409006.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/30475072938.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e3ed1f9d4---jewanewexevadazesokanon.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50608815063.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/88228836481.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610ec2b9696cd---55082939278.pdfIn PDF document text
    • http://cga82.com/admin/File/fuxokifore.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/jakorixotedozudukivumofa.pdfIn PDF document text
    • http://feg.vn/uploads/files/41034907390.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=worm+and+worm+wheel+pdfPDF link annotation

Related samples 8

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