Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee2f447df7ac9a3…

MALICIOUS

PDF

81.5 KB Created: 2021-03-30 23:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 755aa2e05396ac5e18d146d1bfe5a9f3 SHA-1: 09e45115611e1988f3ece67309d991de1add67fc SHA-256: 8ee2f447df7ac9a34f764e2989d8cf5c80ba21ae65b6ef925eaf696066b084ee
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users by directing them to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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/wix?keyword=rick+and+morty+d%2526d+5e+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463308/normal_5fffb1799850c.pdfIn PDF document text
    • https://nigukaxo.weebly.com/uploads/1/3/1/4/131453065/fuvizav.pdfIn PDF document text
    • https://xibutunu.weebly.com/uploads/1/3/4/0/134017024/2758832.pdfIn PDF document text
    • http://apkweb.net/433513271223dsnp.pdfIn PDF document text
    • http://choosemadam.site/how_to_sync_my_fios_remote_to_my_samsung_tvx572v.pdfIn PDF document text
    • http://sodaapp.pro/49980693189nte29.pdfIn PDF document text
    • http://cz-nitrof.website/does_boston_market_sell_mashed_potatoesx4eqe.pdfIn PDF document text
    • http://mirror-x.org/how_to_make_brisket_slow_cooker5q8w3.pdfIn PDF document text
    • https://xufanipup.weebly.com/uploads/1/3/1/8/131856619/xupafafu.pdfIn PDF document text
    • http://triple-doska6.club/becker_cpa_study_material_free_downloadmfreh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378834/normal_5fca83b78a114.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/xirejamimipegid.pdfIn PDF document text
    • https://fukorolavo.weebly.com/uploads/1/3/4/6/134639224/vukakuwox.pdfIn PDF document text
    • https://xasigali.weebly.com/uploads/1/3/4/3/134363336/segobosof_pumilarudi_mubebav_luzuzora.pdfIn PDF document text
    • http://honey-love.ru/guvisalewogodi6e49u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470961/normal_5fe18bf052866.pdfIn PDF document text
    • https://xuwekakef.weebly.com/uploads/1/3/1/8/131856316/2401101.pdfIn PDF document text
    • http://prostotit.site/focusrite_scarlett_2i2_3rd_gen_settingszf6lk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480889/normal_5fe51a439ca49.pdfIn PDF document text
    • https://xumijarivibamow.weebly.com/uploads/1/3/5/3/135339210/reweripajobode_tizedinekut.pdfIn PDF document text
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/48c2ea44a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_605f4620a0ce1.pdfIn PDF document text
    • http://copyrightreports.com/660695740h4avc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F1 4720 bytes
SHA-256: 2c60f606f2f7e4f00647d2c171d8f9e600ae0f0bef3325be9f8524be8c2f314c
font_01_sfnt_off000103dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DD 11288 bytes
SHA-256: 4af4a72c9045b23ec75907f96b916ca6b42d8417b35de424d5e23ab31eaaa3c9
font_02_sfnt_off00012abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3