Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9c7a382e6e0251…

MALICIOUS

PDF

65.9 KB Created: 2020-11-19 11:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ced642af937dbba659a619535b307382 SHA-1: d0c80da25237eabea95beb0e11d016be34f7e0f4 SHA-256: 7a9c7a382e6e025133c20034a137860e696ed09076afcd1d1d9abfc929c65105
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://traffine.ru/123?utm_term=pokemon+reddit+trade+codes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427095/normal_5f99e958651ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5fa5d2c3de427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5f8e08c01be81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_5fa9e657d211d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_5f8fb8ac2afa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504788/normal_5fad87df1cc01.pdfIn PDF document text
    • https://zetizisoxaw.weebly.com/uploads/1/3/4/4/134498522/wejarigivabakixo.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/botuxefimaf-vaguziv-wexasivekudoked-tetimote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/truyen_tranh_doremon.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/pumiwet.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/desegaku.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/2440490820.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/12287658851.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/petepomuduvatusebu.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/arrow_yardsaver_shed_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/45037110120.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC654 5116 bytes
SHA-256: 8ee136321a36c1249914760036b61905dfbec204467ea8b95c9e6d35a5e29238
font_01_sfnt_off0000d7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A4 10544 bytes
SHA-256: 35c557f12ac4aa8168fdcf35519869c6a00ed34d48f5f5be612cfc15c46af0f3

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