Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0c7cd599d43869…

MALICIOUS

PDF

72.6 KB Created: 2020-12-21 18:34:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 09fa680cad234abdd56cb42ba3a6b837 SHA-1: 988d229c955bdf1b9a8d6989813de1096960ee76 SHA-256: 8e0c7cd599d438692918070d881d6e22486facecc03b8e99c51354f9ab6e0d23
156 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically indicating a link farm and potential phishing content. The presence of numerous external links, including one pointing to 'trafffe.ru', suggests an attempt to redirect users to potentially harmful websites. The ClamAV detection further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffe.ru/strik?utm_term=top+20+hits+2020+youtube PDF link annotation
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/987bd1eda7b12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451930/normal_5fa148a1d7701.pdfIn PDF document text
    • https://mumixiginuwogi.weebly.com/uploads/1/3/4/7/134752923/d4f18e97e424b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391909/normal_5fb9dd791ccad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5fac15230fc69.pdfIn PDF document text
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/cf4fb9d326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373239/normal_5fb4788231154.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48e29ee0f32b8749bc91/1606371555222/6.2_using_resources_wisely_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/format_factory_for_pc_full_version.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e5b8a3bf4b14aba92f9c/t/5fc48f683485235c86581aaa/1606717307467/6800592648.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 5

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD398 4808 bytes
SHA-256: 667ae072501ec075926720db018d118367df7ea860fa30b4cd72e84b63c34e04
font_01_sfnt_off0000e408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE408 10456 bytes
SHA-256: 15d724f445c763b5e68c5917d5b81b0f36ef1222d2e59c5fa5fed820c18929cd
font_02_sfnt_off000107bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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