Malicious PDF — malware analysis report

Static analysis result for SHA-256 806ceb06136a43c1…

MALICIOUS

PDF

39.3 KB Created: 2021-06-13 19:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e8dbd79644b0524feb0bb8f3b322c3ba SHA-1: fa43ab2c61ebc410e4aa66ddc28f8cf0dd3f48da SHA-256: 806ceb06136a43c169d19310d2572beacda48aeb51a03e4c686e7808a7a6ff24
204 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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 0.7452

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://ketchas.ru/pbw?utm_term=spongebob+season+1+1080p PDF link annotation
    • https://nasaperexi.weebly.com/uploads/1/3/5/3/135351481/2814685.pdfIn PDF document text
    • https://basosogufu.weebly.com/uploads/1/3/4/6/134682995/divofodosov-gavapiv.pdfIn PDF document text
    • https://jugidemavewug.weebly.com/uploads/1/3/4/2/134265355/zajubusu.pdfIn PDF document text
    • https://famatogovux.weebly.com/uploads/1/3/4/6/134614416/1719688.pdfIn PDF document text
    • https://rotemewan.weebly.com/uploads/1/3/1/3/131380756/runalemakarisenus.pdfIn PDF document text
    • https://pasuzexogisinib.weebly.com/uploads/1/3/4/2/134266431/toxokifasubor.pdfIn PDF document text
    • https://vufofameti.weebly.com/uploads/1/3/0/8/130874118/28523136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386366/normal_603fc8cd88c65.pdfIn PDF document text
    • https://zidivopopa.weebly.com/uploads/1/3/4/3/134373798/navep_lipalabumazutez_zuxirubaboni_mapiposofu.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4390324/normal_60b350cd78e65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477369/normal_5fceef5e606f3.pdfIn PDF document text
    • https://miletobe.weebly.com/uploads/1/3/4/8/134860907/pufuvaduz_rujobepa.pdfIn PDF document text
    • https://zatitudebijozi.weebly.com/uploads/1/3/4/4/134460539/5348306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64effcad-5404-4be6-9c2c-d8c4c80e900a/linodatulubajap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581ac20a-8263-4485-8a09-39feab63895d/wekenakato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ba547b7-4976-4ae5-8a80-46ce5112c931/5404701834.pdfIn PDF document text

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