Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb43bb1a34cb3a9…

MALICIOUS

PDF

80.7 KB Created: 2021-02-17 23:00:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 284f72ad0970af141e44b06fecdff13c SHA-1: a056fc970138afbd60ec733deea728504f910a78 SHA-256: cdb43bb1a34cb3a973e59cb5a211d78c7295e42cfce6f93eb7fd7b42e1ca66ad
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to game guides, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=wow+monk+tank+leveling+guide PDF link annotation
    • http://sodaapp.pro/koxasodc20bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418381/normal_5ff3b2a8ace1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484114/normal_5fe07d0a1e8f0.pdfIn PDF document text
    • http://tisurejafin.22web.org/8153693909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495837/normal_602310b93e9d3.pdfIn PDF document text
    • http://tinizorejit.22web.org/finding_median_from_frequency_table_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426257/normal_600307d018080.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483833/normal_6007fbde8cc96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lasesesavobopom.rf.gd/logic_maths_puzzles_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/wallpaper_shayari_romantic.pdfIn PDF document text
    • http://sinodigewenewe.rf.gd/brute_force_attack_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/cablofil_cable_tray.pdfIn PDF document text
    • http://sujemitusosida.epizy.com/interview_questions_for_teaching_assistant_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/50355584667.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/stay_with_me_goblin_piano_sheet_easy.pdfIn PDF document text
    • http://wufizomofoduzin.rf.gd/5880041379.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/belugedivozogadowogeke.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_off00010158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10158 5100 bytes
SHA-256: d07bd4f8d097c5d11558a4ec8dbe789399dab9553d9d6813cd09097d4a9749c2
font_01_sfnt_off000112c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C4 10376 bytes
SHA-256: aae02280438030b0e95fa7ca99274a137be94db85c08c319d59a4223a205807b

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