Malicious PDF — malware analysis report

Static analysis result for SHA-256 484ab6ca0fec7c79…

MALICIOUS

PDF

85.3 KB Created: 2021-02-14 17:31:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ef2f056c70dd19c099d7b1609c57a83e SHA-1: 802c34be63bdab694afa690b5d850b4542daa28c SHA-256: 484ab6ca0fec7c79ef862aed7fc557be622784a43ebf304efb269773261f3dec
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of embedded URLs, with one pointing to 'bologen.ru', suggesting a phishing or malware distribution campaign. The PDF structure and embedded content are consistent with attempts to disguise malicious links as legitimate resources.

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://bologen.ru/wix?keyword=usa+test+prep+answers+world+history PDF link annotation
    • http://begemotiks.fun/nautical_almanac2or84.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/dgcjgic/feisty_pets_unicorn_argos.pdfIn PDF document text
    • http://copyrightprivacy.site/lectern_crossword_puzzle_answersjsuig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408482/normal_6022d0ebcfb0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450428/normal_6022238b48739.pdfIn PDF document text
    • http://degitowexara.iblogger.org/vinabepusojofotanareb.pdfIn PDF document text
    • http://itactical.xyz/659691100479zi95.pdfIn PDF document text
    • http://genoray.pro/pipaxagurajmf2s1.pdfIn PDF document text
    • http://sungo1.space/canvas_template_photoshop6xjb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_601e4492ea8e7.pdfIn PDF document text
    • http://yoptan.space/vufugumitewewobagalagumlz.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/hejgehj/gegobubarudopere.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
    • https://s3.amazonaws.com/mujevubutukoxu/reading_comprehension_strategies_worksheets_for_elementary_students.pdfIn PDF document text
    • http://lojupodinitaxug.epizy.com/tamexarusupibenakozazezij.pdfIn PDF document text
    • http://dajaxul.epizy.com/33482995851.pdfIn PDF document text
    • http://pupovedifa.rf.gd/wrox_professional_assembly_language.pdfIn PDF document text
    • http://tedijafubivot.epizy.com/lelomirasu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001059f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059F 5020 bytes
SHA-256: 3517e9736df3e94543038d8bdbf454307fb22a9c2aa4a82cf662b5e0b4991bc0
font_01_sfnt_off000116b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B5 10268 bytes
SHA-256: 5e8a238e4a96ccd6c4966f184350473074ba9927167de76c52f475a8876c0dc6
font_02_sfnt_off00013996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13996 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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