Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8e7dd0d49dcb03…

MALICIOUS

PDF

58.5 KB Created: 2021-06-10 16:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e4b99cdfae66af5c55a91e3b137c145c SHA-1: 85748446b06a95ac7a3d57f7e36ce5334660051a SHA-256: de8e7dd0d49dcb030e2cfd5c57e6a2856fcef68e30ca6647396c9655e5f14c32
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 0.8253

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://oniceh.ru/pbw?utm_term=the+whisper+quest+2020 PDF link annotation
    • https://gabamavipe.weebly.com/uploads/1/3/3/9/133999819/jilejuwop_voteg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495691/normal_60c18ba8a75b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_60631282c388f.pdfIn PDF document text
    • https://samarobiratepiw.weebly.com/uploads/1/3/5/3/135327643/gakubasedevow.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/lajut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_606e104f4d786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_600c6330f3561.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/toremazijejibupekex.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/48b1ba7a-7083-48eb-bcb8-cba3ef2ca545/mifeganuwigipodisos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b0d0d1-c216-4124-858e-31b353c4acea/65034347488.pdfIn PDF document text
    • http://gedelageke.pbworks.com/f/the_philanthropy_of_andrew_carnegie_dbq_answers.pdfIn PDF document text
    • http://jopamedet.pbworks.com/w/file/fetch/144444210/lonomigesamasuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/159bfe5c-8138-4955-9ce3-35525b4058c7/what_is_polymorphism_in_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e8a177-a2bc-419e-9dc6-348ca2be3611/wofidamer.pdfIn PDF document text
    • http://didaneguk.pbworks.com/f/wipobogofutamuxelulunebip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7754d558-a827-4367-814e-458041a202f3/how_much_does_a_clinical_psychologist_earn_in_australia.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_off0000d6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DE 5108 bytes
SHA-256: 856e3185a39da3ceca4485d4a1c0fd13eee3fa5d8a18080548982d702ecd54fe

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