Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3e6d124174f8af…

MALICIOUS

PDF

70.1 KB Created: 2021-02-10 19:16:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2cd4a181ebba3c0829b1e2d1940d5299 SHA-1: 7ada2c38f64fe34a4bfcbabdd9c06b3f4ccc15cc SHA-256: fc3e6d124174f8afcb84644d0fd9f4eae435273f6981c3ab675eb302a5dc1d46
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous external links, many hosted on disposable or Weebly domains, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • 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://seumenha.ru/wb?keyword=camisa%20social%20uniforme%20feminino PDF link annotation
    • https://zewerigavuj.weebly.com/uploads/1/3/2/6/132681779/c7182c1a8a8.pdfIn PDF document text
    • https://xonutupusuvulin.weebly.com/uploads/1/3/1/8/131871786/7105638.pdfIn PDF document text
    • https://nidabiweni.weebly.com/uploads/1/3/4/8/134865500/nonasunojuna.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/AkWFghh/stickman_ninja_2_ultimate_ninja_warrior_apk_download.pdfIn PDF document text
    • http://gebatuvarak.66ghz.com/comfortably_numb_fingerstyle_tab.pdfIn PDF document text
    • https://sigoberedida.weebly.com/uploads/1/3/4/5/134594083/gofumozaladore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_5fd84a138004a.pdfIn PDF document text
    • https://bobujiwa.weebly.com/uploads/1/3/1/0/131070874/4919661.pdfIn PDF document text
    • https://vapevaka.weebly.com/uploads/1/3/1/4/131407737/dokiliboselekevilupi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389085/normal_5fcc8f3b94117.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/bjdZiap/borunizezifimutibozil.pdfIn PDF document text
    • http://nawogevimogagu.22web.org/voboduzazopumizu.pdfIn PDF document text
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/9299346.pdfIn PDF document text
    • http://kivudutamazawan.22web.org/83851678166.pdfIn PDF document text
    • https://nezopubetuw.weebly.com/uploads/1/3/2/6/132681339/cfdea8f5151e2fc.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/tojivefifori-bapapi-ranetapewej.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/UgSCAjg/29405816600.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/hhugihc/zomefifopov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuwemajufa.rf.gd/kujalexopomitukekixukap.pdfIn PDF document text
    • http://gadudadu.rf.gd/reading_comprehension_practice_worksheets_2nd_grade.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_off0000d0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E7 4932 bytes
SHA-256: 00be79b9ad361c9127701e912e8880065c3cfed866e079e4faa4d75b71069bad
font_01_sfnt_off0000e191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE191 12252 bytes
SHA-256: 175a5526fc72a1c592820a73eef2a1ccda2252381c2b871e64798f0706ad8163

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