Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6937ad353e1a6e…

MALICIOUS

PDF

67.4 KB Created: 2020-12-18 19:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c79b615141c2f269b99cc969354a2653 SHA-1: 92b2fed181932e8798e31fde27c8a015cf50321c SHA-256: 8a6937ad353e1a6e0b276eb1b6a84f6c04eaabcd8de1c9482a2b0df3c519b703
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 0.9997

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://traffnew.ru/strik?utm_term=zombie+shooting+games+mod+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367281/normal_5fc4aa914b64c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5f8ceea6535c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_5f9f1f707a8ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495994/normal_5fbfb29e4746c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403537/normal_5fc51868e6a1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384647/normal_5f91fc91409db.pdfIn PDF document text
    • https://xovadesunuzavam.weebly.com/uploads/1/3/4/4/134479636/rimoxonijurabejalep.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/1799969.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc3690c2e537a05ef19187d/t/5fd0452afc93c51d16d962e1/1607484714848/retro_highway_gameplay.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a29a717a0f60c4048903/t/5fcaec2a26a2be7f6dda224c/1607134251098/master_word_meaning_bangla_lovely.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58baf084698658e7dd217/t/5fcb3d98b495bd20281e7166/1607155097490/koalas_to_the_max_dot_com_different_pictures.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7D 5404 bytes
SHA-256: 0ee49b68397806bb06e916f799267c7f5897e25513ec7ca404414917de6f9f63
font_01_sfnt_off0000ddba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBA 10404 bytes
SHA-256: e3a5970b7c692dfa3071e358b228c1294e3a118081bc64c81cdc901670f02e90

Open this report in the interactive analyzer, or submit your own file for analysis.