Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8a69916f2c1edb…

MALICIOUS

PDF

84.8 KB Created: 2021-02-24 16:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 55dcff4a71d6c56e10d8384fd760bc20 SHA-1: 76da4fbeafb2e8f14b10415fad1ea19b996efa0e SHA-256: ee8a69916f2c1edbaab6f9b93257ae6c28dd5ff6dff0e9b9447cb202db807b8c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with several pointing to potentially malicious or link-farm domains, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the document structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/award?keyword=what+does+guerrilla+warfare+mean+in+social+studies PDF link annotation
    • https://cdn.sqhk.co/satofurijob/mjcjbhj/62515152955.pdfIn PDF document text
    • https://cdn.sqhk.co/jorobasobu/hbGhauv/hunger_games_whistle_ringtone_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/hjaiiiA/25633154164.pdfIn PDF document text
    • http://manoligixave.66ghz.com/69222235391.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377905/normal_5fe24ec649af4.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/djbxgf5/77227828737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424010/normal_600d5cb559537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487918/normal_602c7049261e5.pdfIn PDF document text
    • https://cdn.sqhk.co/tikisudolo/5ynFjd8/falotamutot.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/ijhbpge/4221288935.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/b6d9ihZ/face_mask_are_required_by_law.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/jjgXjj4/microsoft_azure_fundamentals_certification_salary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422894/normal_5fef77176b77c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nimitijas.rf.gd/cyberpunk_2020_release.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/petamizepigereved.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/phishing_email_templates_free.pdfIn PDF document text
    • http://mupelaj.rf.gd/32865655189.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/62770170194.pdfIn PDF document text
    • http://ledojefuvase.rf.gd/sound_effects_pack_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/audiovision_for_video_maker_unreleased_apk.pdfIn PDF document text
    • http://tiwadelir.rf.gd/abdominal_workout_routine.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_off00010e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E10 5540 bytes
SHA-256: ed372a33e9ccf9e986d91e135935dbb1c16aace6535ebe8e97f866b92b3a3e07
font_01_sfnt_off000120d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D6 10812 bytes
SHA-256: 819d7cdf5ab17924c8a54f70ddebda07948bc55aa60fde44bc8ea23055c181b8

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