Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bc286b07344853…

MALICIOUS

PDF

77.1 KB Created: 2021-03-09 13:32:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 771573906b20540eb204989c36d0d824 SHA-1: ac1eca1e511b274e9d705f453a24d780dce969ad SHA-256: 93bc286b073448535120a5a8a41c50c6672097e57b123b5691dbb9c91810810e
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 0.9996

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://leonvi.ru/wb?keyword=how%20do%20i%20fix%20the%20red%20light%20on%20my%20spectrum%20router PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494677/normal_5fcc91e1efe9a.pdfIn PDF document text
    • http://lyudi23.ru/guvuvukebarukibulw6rj.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/6GJv2Zx/chess_opening_lab_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486221/normal_5fd2d01d5768f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393190/normal_5ff30b1007079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450247/normal_60324aedc6851.pdfIn PDF document text
    • http://wimixolumow.iblogger.org/nigatuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407085/normal_6032d2fe9e215.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482188/normal_5ffcfee7e36c3.pdfIn PDF document text
    • https://cdn.sqhk.co/xinefegepe/h2d9jdO/sufidewikositol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476930/normal_6015b20947347.pdfIn PDF document text
    • https://cdn.sqhk.co/zidenesek/akiiidZ/minecraft_skyblock_world_download_1._16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369665/normal_5fefe87d713b6.pdfIn PDF document text
    • http://newapegujopabi.22web.org/what_if_god_were_one_of_us_lyrics.pdfIn PDF document text
    • http://itwomen.space/chapter_10_blood_answer_keyhhbc2.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/jhXUiiJ/california_earthquake_1989_map.pdfIn PDF document text
    • http://freshka.fun/memidikolijonoretopalumerdohe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kalawutef.rf.gd/mesiwurutaxekomev.pdfIn PDF document text
    • http://majaposudirux.epizy.com/what_common_food_items_have_gluten.pdfIn PDF document text
    • https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_dec100bc6ae54f4196af356d2b0f2530.pdf?index=trueIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_c55cb7b6b35b4c57b09db6b6c1eebbfb.pdf?index=trueIn PDF document text
    • http://gebutetivifupa.epizy.com/kelufukibuvepesolunaf.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_off0000ef66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 5580 bytes
SHA-256: a7d3e5f5e0efa872363877d2d55fe0ce8f4c8314e0a8e7183ae33a85dae31b3e
font_01_sfnt_off0001025a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025A 10672 bytes
SHA-256: 0f2eb87fa864dc0a03c370ede46275c0019be52f50beeb55a6626c4f11d35060

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