Malicious PDF — malware analysis report

Static analysis result for SHA-256 136b9d11a146bbc8…

MALICIOUS

PDF

74.7 KB Created: 2021-02-26 20:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 0111195840bdb07727a02d5ceca6b092 SHA-1: 8b25992303674ab2f3bf15b6fbb6c4dc0f7259e6 SHA-256: 136b9d11a146bbc865a2d8af674ffca9939a1dcfa7f1b3ec7ba5e68d3121c812
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to pool equipment, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=how+to+choose+a+pool+pump+and+filter PDF link annotation
    • https://cdn.sqhk.co/juxefirapuf/2hjzQXO/driving_simulator_games_pc_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387240/normal_5fdfdaa6a0c02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490116/normal_5ff085af2bd07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_60290cf81c81d.pdfIn PDF document text
    • https://goxadivitekoze.weebly.com/uploads/1/3/1/4/131437736/3c5a6685c0b5572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_601491467167c.pdfIn PDF document text
    • https://wojaginobaxap.weebly.com/uploads/1/3/1/8/131857211/1823756.pdfIn PDF document text
    • https://cdn.sqhk.co/sisagoku/fdalkmd/metrozone_chennai_address.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386613/normal_5fffc4e4c13fa.pdfIn PDF document text
    • http://safetymirrors.xyz/the_girl_from_ipanema_trumpet0k8he.pdfIn PDF document text
    • https://subafoxa.weebly.com/uploads/1/3/1/3/131379179/jerosufosoxu.pdfIn PDF document text
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/votifafe-kogaxu-wiwefekoxiveru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/fesobotalobupofevaxet.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_off0000e85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85F 5448 bytes
SHA-256: 679f7fed4461f1ec18aea6946f2c9774af55ba80794236f502cde70eff9ed223
font_01_sfnt_off0000fad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD2 10444 bytes
SHA-256: bdd90a6fba15b4a06d69786240057aa7ee7e6243823dc8e12fd2f88760ed474c

Open this report in the interactive analyzer, or submit your own file for analysis.