Malicious PDF — malware analysis report

Static analysis result for SHA-256 439775f0d6557c17…

MALICIOUS

PDF

47.8 KB Created: 2021-08-21 19:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0c169647452f9c4bf906942b2e555a28 SHA-1: ae3a079476d7045f91d99cd85cd66be0fb66c6c0 SHA-256: 439775f0d6557c173618bce9ca3627779bcae722b6938c82e5e253612ea0fdcb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to websites hosted on compromised WordPress installations. This suggests a phishing or spam campaign aiming to direct users to malicious or untrustworthy sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5383

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://chothuexehochiminh.com/userfiles/file/42759563347.pdf In PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdf72c2919---37982018225.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/5fef04bb1a5a043a42cad8e76cb1f950/pisamikidadadegulewase.pdfIn PDF document text
    • http://askort.pl/Upload/file/71425964222.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2b73d3f0a---94340420547.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/tuxurawarajixi.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/60795571275.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/pojuwegiw.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16076521457f25---79475087683.pdfIn PDF document text
    • http://esejsc.com/upload/files/23098198882.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/09d5f79b687727a860b705a3604c154b/75725281061.pdfIn PDF document text
    • http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/850508566.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/37392037268.pdfIn PDF document text
    • https://mo-space.space/web/img/podborky/files/70445344655.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6366cb9d3---2049633246.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/jedujapofanasololokeguwor.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/kilunitigotikerus.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e478c3b43---fadowugufuloge.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/24e86abefdef546a133c8ad8b653aff3/daxifeja.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/fufaturik.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/10t44r53parjlelcvro2eea7ch/21394310565.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/b110256f6ed5c80ccaed891927705fa7/71457438382.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/da98db67e7c98929b897f4d366ac39de/donemegevoruberogibekar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=lesson+6-3+elimination+using+addition+and+subtractionPDF link annotation

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