Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3e86ce76e4077b…

MALICIOUS

PDF

65.3 KB Created: 2021-06-13 01:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d364ae059e70ba52ec4b8267e3978066 SHA-1: b1b7f525d5dce2b28a327758442d3b706f8334a2 SHA-256: 9d3e86ce76e4077bed458977af98de16dfdd0150f55c5ea284872bd8526bbc46
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9722

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://archism.ru/pbw?utm_term=imo+free+downloading PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486368/normal_5fefb8c094726.pdfIn PDF document text
    • https://nakosedamewa.weebly.com/uploads/1/3/4/6/134612328/9205565.pdfIn PDF document text
    • https://tomasuniraruz.weebly.com/uploads/1/3/5/3/135392941/275c500996a.pdfIn PDF document text
    • https://joxisewegiwazev.weebly.com/uploads/1/3/4/6/134669132/xosuzulemajabimitabe.pdfIn PDF document text
    • https://xoxigukot.weebly.com/uploads/1/3/4/8/134861038/8114266.pdfIn PDF document text
    • https://jitedamanun.weebly.com/uploads/1/3/4/6/134627504/5615832.pdfIn PDF document text
    • https://gukozorupo.weebly.com/uploads/1/3/1/4/131411088/xogojate.pdfIn PDF document text
    • https://muwigoxafom.weebly.com/uploads/1/3/4/8/134869335/2f5ef78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380076/normal_603306e89a335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405185/normal_60c5345ada5cc.pdfIn PDF document text
    • https://xomivevisavuwog.weebly.com/uploads/1/3/4/8/134852088/nokepef-reruja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490917/normal_5fcd04e11cf9f.pdfIn PDF document text
    • https://nojuguxupibubir.weebly.com/uploads/1/3/1/4/131438610/xopupopik.pdfIn PDF document text
    • https://fapizorimuko.weebly.com/uploads/1/3/1/1/131164308/gonixoli_ziranoret_bekafe_gozax.pdfIn PDF document text
    • https://bomevalaruzaf.weebly.com/uploads/1/3/4/8/134871705/e1c6d6e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff0658c-b77e-4023-84e4-c13171e519a8/can_you_legally_have_multiple_wives_in_utah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b06d86e-2851-410e-a3da-65ee2f8e9e51/235704019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c997b5d2-7ead-4b15-9993-24383b069cb7/is_comptia_a_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/284eb551-2976-4ee1-86ee-685b3855994d/norawuwufupalatigaxirutum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bcb7a5c-cce4-428b-aae3-4d609582a0f5/96734765533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b921847-16f3-40f9-afdf-72186a46b869/34536607807.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE79 5080 bytes
SHA-256: 64682713cbd9118883a33c75da06d7a844d777bff0a594688368af601c7f5363

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