Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3507a2ee708ca2…

MALICIOUS

PDF

38.0 KB Created: 2021-06-17 02:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4d9295635ee97ece8cdc473bef742a0d SHA-1: 2fc1c9157a9d0a28667ee2fe9bc3737f976457a9 SHA-256: 7f3507a2ee708ca27b92916c5a297d4bc4dd723349eb588ed424004af24a4ec1
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 0.6440

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 37 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://infrive.ru/uplcv?utm_term=olympic+weightlifting+program+pdf+free PDF link annotation
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/1f2f777186ccc237ec0c005ceaafa7a3/10409155473.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/o7sfuqn6hcvti9l6si2ed294k1/nokemuraxufim.pdfIn PDF document text
    • http://schmetterlingsgaerten.de/file/4094066672.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099c3a095cc3---tulekipiw.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/tonuxosudisim.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/1e2de7cebedf0475857db4454955ec68/98387555311.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/77837409569.pdfIn PDF document text
    • https://scheidungsrecht-best.de/userfiles/file/10664350224.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606de01625e10---88927381515.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/9d3280723d11d5a2ab6b09d06e65cb84/26270755790.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/In PDF document text