Malicious PDF — malware analysis report

Static analysis result for SHA-256 5676e7fd78cc0f45…

MALICIOUS

PDF

62.2 KB Created: 2020-12-17 12:29:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f1d17d86bb63d10769c63b1e689ecf7e SHA-1: 15ee816fce02ae386832078783e14ed886258788 SHA-256: 5676e7fd78cc0f458df1a5d08245e9bf385861ce1c37154af3d9bad5a537f00f
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 0.9994

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=175%252F70r14+white+wall+tires+hankook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412570/normal_5f94137a24a05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375086/normal_5fa18022dcb18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_5f9e2c146ba4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393183/normal_5fc37f318f979.pdfIn PDF document text
    • https://sitawixabebel.weebly.com/uploads/1/3/4/3/134319036/8fe441fb80.pdfIn PDF document text
    • https://zovuwiveja.weebly.com/uploads/1/3/4/8/134880504/13db3308.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459165/normal_5fc4d5228ca79.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/5fc4f8ee085bf90c0e173f98/t/5fd66da872b1137fa977d93a/1607888296992/fumefopotiguvex.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/57237468811.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd56316f6d44b07b8b81c/t/5fc1bc60e6d49a06bbd35b4c/1606532193034/8_ball_jacket_man.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/62903791337.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc329c41c8c74131440bc1b/t/5fcddab5662d5e24e0c46384/1607326390220/17986930101.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA956 5144 bytes
SHA-256: d8c5eccc7675a65dc1b294fd6376e7c690a458d77c5a2fc8802139a510db7b0b
font_01_sfnt_off0000baee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAEE 10220 bytes
SHA-256: 005cb87f3597a0654f03c5e20140f99c4dce0965f6124cc4adecc9acc18f7321
font_02_sfnt_off0000de0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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