Malicious PDF — malware analysis report

Static analysis result for SHA-256 630b7d555c4c1993…

MALICIOUS

PDF

76.8 KB Created: 2021-05-02 23:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fe72b9e609584102ffeb0e137499faca SHA-1: 9f1c73a2d0d9d994cb53e2ed1266f42a06a877ee SHA-256: 630b7d555c4c19933e0f214a697d9d79bca1176d186aa64386e4925496959b75
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://druttle.ru/strik?utm_term=python+programming+for+beginners+books PDF link annotation
    • http://redarirot.iblogger.org/funapumunesonowazonuz.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/ggj8hdK/superhero_trivia_questions_and_answers_printable.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372086/normal_5fe1021c5d8b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367921/normal_5fedc11d9d89b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459477/normal_6066656c67dfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5fe934b73d16e.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/MQajj1n/66686746218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382782/normal_60500f113f218.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/mqgejih/4x4_offroad_parking_simulator_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/jy6MMN0/46646719751.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384463/normal_5ff40a5fe5c79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414864/normal_603fb094b43fb.pdfIn PDF document text
    • http://gixuzozubo.22web.org/how_to_use_samsung_remote_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vapekepufarifo.rf.gd/wajunusapalo.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/how_to_draw_anime_girl_face_and_hair_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a5ff24-8728-49e9-bbdd-453e9c54d63c/miniature_dachshund_puppies_for_sale_springfield_mo.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/40246527527.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/rirumisapegixuxokiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01474de9-8487-4a66-8d71-732ece409d0f/answer_key_brainpop_chemical_bonds_quiz_answers.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 8

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_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 5588 bytes
SHA-256: 31d6e7a451a3622e27bdc69f1c2dc70a1ad8df557c691de2595a568642716e2b
font_01_sfnt_off0001007f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007F 10836 bytes
SHA-256: aba79033565ba6f1d37482214465dcea54c04caea20540876bcfaab877b0bd58

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