Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f00c22bd728190…

MALICIOUS

PDF

70.1 KB Created: 2020-12-22 02:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: afc093e25df4b550ce5c102e17b6ca69 SHA-1: 70ea4fa7bc04fe1415187af0eb6a5952951398fc SHA-256: b1f00c22bd7281903fe49b2be7ffd687c168a5bd95af3bf3ec17cfe97a049c84
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'traffine.ru', which is likely a malicious domain used to distribute malware. The document body, though heavily obfuscated, contains text related to 'call of mini zombies apk pure', suggesting a lure to download a game or application.

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://traffine.ru/strik?utm_term=call+of+mini+zombies+apk+pure PDF link annotation
    • https://wumasokur.weebly.com/uploads/1/3/1/3/131384536/387e3.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/wozowuledij/work_activity_log_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/driver_bluetooth_laptop_hp_windows_10.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36ff3c6d9645836323309/t/5fd0a47651357b44bb95a3f2/1607509112719/free_hd_movies_2020_watch_free_online_cinema.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe0062051e6b539731e53fd/t/5fe028838afbbc2717896781/1608525955662/zumuketefat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde89c80172f85bb329d465/t/5fdecb7691828d0f5d4f5d53/1608436598809/rotate_animation_in_android_example.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/bobby_east_ft_koby_video.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/wuwopawozunejisupemolekus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55a941c8c7413144fa64b/t/5fc8119390a4f8549d688be1/1606947221518/50508671833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47df777f-c41e-41c8-a47c-13c257ab939e/40102397824.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/kosomudapinuvuritagimog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fe0fc37-6b2a-43df-9f22-f13334f4a0e9/reduced_relative_clauses_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/evolution_of_computer_programming_languages.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_off0000c9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C3 5204 bytes
SHA-256: 25c72bbe86d1c8d6bc0543bb874b916edbe479bcfde6cc90ccc433d587a78240
font_01_sfnt_off0000db68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB68 14848 bytes
SHA-256: 2479a1354fca7986ce31e484b91f5a9750d9b5acb0fe0bbeb5b01d892e91e45c

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