Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02e5092e55dabee…

MALICIOUS

PDF

71.5 KB Created: 2021-02-12 21:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: f28da84a85301311f4a1b59db499cade SHA-1: c442769a64a8861ab916252cbe37adda62a389e3 SHA-256: a02e5092e55dabee37d8af4176d8976e728f2a17b7125354600b243e8a07c588
126 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan. It contains numerous embedded URLs, with one specifically pointing to a keyword-based search on 'druttle.ru', suggesting a phishing lure. The document body, though heavily obfuscated, appears to be a disguised attempt to trick users into clicking the malicious link.

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://druttle.ru/wix?keyword=kitchenaid+superba+ice+machine+manual PDF link annotation
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/7597145.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424645/normal_60075d76bc11d.pdfIn PDF document text
    • http://winoorama.website/xavokutunokowunirux16lbr.pdfIn PDF document text
    • http://copalofa.site/putanand6s.pdfIn PDF document text
    • https://cdn.sqhk.co/lusikagidet/i548hjV/atualizacao_brasfoot_2020_janeiro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459636/normal_5ff15ed74e1f0.pdfIn PDF document text
    • http://fruit-citrus.space/discografia_de_conjunto_primaveraju07k.pdfIn PDF document text
    • http://my-favshopc.online/lolinedefozoe44es.pdfIn PDF document text
    • http://itasummer.fun/mega_unblocked_games_minecraftpmsgw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_60187d6bf2fd4.pdfIn PDF document text
    • http://dewiwusuxutez.iblogger.org/lutetidofopitemamodij.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/0igifuR/80246933942.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/CgfQhe2/45921991582.pdfIn PDF document text
    • http://samelike.site/forgot_google_password_on_android_phone9h3ht.pdfIn PDF document text
    • http://hydra.moscow/cyberlink_powerdirector_7_oem_activation_packhze3l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kedogevakubonog.epizy.com/28156579240.pdfIn PDF document text
    • http://posojorodinu.epizy.com/hospital_evacuation_plan_template.pdfIn PDF document text
    • http://vumafovixono.rf.gd/computer_science_engineering_books_free.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_off0000da67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA67 5424 bytes
SHA-256: 19a0ac545a1fdc38dcf0a66805a755e96147ba116b92e9ffbfb0f7e29faa0577
font_01_sfnt_off0000eca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA9 10612 bytes
SHA-256: 5cf1acdf01ff12e6d5e4230e99bca1ecafd33be05e2f5a4786c1d495e15886dc

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