Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb5f734b8deac8f…

MALICIOUS

PDF

83.2 KB Created: 2020-12-29 19:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1b3fefedffca71d39fa673d15a54144b SHA-1: 9f6b06b00c511a5aae6f267d7701f5becdf67b3d SHA-256: 4bb5f734b8deac8f9c72ca626f831078cc9a3942a69dc73ed21aa7e8b18b05ab
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a phishing site disguised as a purchase page for a 'liar's dice set'. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=buy+liar%2527+s+dice+set PDF link annotation
    • https://cdn.sqhk.co/pimidima/ih1srie/lajifexerozel.pdfIn PDF document text
    • https://cdn.sqhk.co/fekimevexi/ih28Tgh/muse_dash_switch_gamefaqs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f94957755359.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412900/normal_5fe5f4c55ca92.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/VQs57hK/hustle_castle_arena_store_prices.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459780/normal_5fbb25817dbbe.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/gdTWU2T/mcdonald_s_menu_calories.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://uploads.strikinglycdn.com/files/97cd3eee-5e47-4f2b-8f65-4ae49c80e840/49384578603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a91a066-89c5-408e-a952-ed1a859dba46/dukonasibidap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff341000-8b4d-47d5-82ae-cc35f2127ab7/50829327489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/086c7502-4d46-4be2-82d2-1c03b35e6fd0/35107783562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35f1595f-3021-4fbb-9fb7-61abad19ca66/kedivesefopebu.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_off0000f99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99D 4784 bytes
SHA-256: 1649362b21b1184e76040c73a4ce4cb0a27d721cbe8e349100ea83227f7ecd6d
font_01_sfnt_off000109fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FB 12024 bytes
SHA-256: 41fd21ccc213c218d0d7056005ef7e658f0c38370585a4f196e1971394958fa7
font_02_sfnt_off00013234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13234 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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