Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3869d48cccedbc…

MALICIOUS

PDF

69.0 KB Created: 2021-03-20 14:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 99996ecfd059f028b6122927f90c8a00 SHA-1: 58a930b16591797504697a630dc9ad1081eb34e0 SHA-256: ef3869d48cccedbc716dd482760685a4fd96602932f604a7cfbbf5f70208125c
126 Risk Score

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://mezovuduw.ru/wix?keyword=minnie+mouse+flipping+fun+kitchen+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427504/normal_6044fe4c4bcb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458616/normal_603fbaaf35bb7.pdfIn PDF document text
    • http://polafozu.iblogger.org/jebexodufup.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/sjhiicc/metal_madness_pvp_car_shooter_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/dhatYkv/45942612194.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/how_to_open_a_t-fal_pressure_cooker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_601cfb5ef1933.pdfIn PDF document text
    • https://cdn.sqhk.co/bolomadu/ijbqfhf/rokuwodasusavokupukitemi.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/fiigiaS/crossy_road_download_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/gschcFk/ice_princess_dream_castle_b_m.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/50278908375.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/falagaketebexoveredizala.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/business_vocabulary_in_use_elementary_to_pre-intermediate_with_answers.pdfIn PDF document text
    • http://faguduni.22web.org/27293418888.pdfIn PDF document text
    • http://xetelafeke.iblogger.org/43127207453.pdfIn PDF document text
    • http://gitipakivo.iblogger.org/normal_distribution_table_z_score_calculator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ce91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE91 5392 bytes
SHA-256: 47497c94d3ff8fa6fd92934564fb499022320420a2dd2aaae442fbb6fdfc3aeb
font_01_sfnt_off0000e0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E2 10676 bytes
SHA-256: 9c6b23d304c60f2029c2631d447e116fb32bbd51e107766edefab3cea4e2a6a9