Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b8401775f450833…

MALICIOUS

PDF

77.1 KB Created: 2021-04-20 22:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a7982d3c1a139e64bc1b6458c43a54cc SHA-1: 29d357a4ce2a22b2685ec870a490ed1c78f8dcfc SHA-256: 2b8401775f450833596af117f63d8ebc83b79d5606a64aac85c2d5bbbd977417
96 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/strik?utm_term=the+mortal+instruments+city+of+bones+2013 PDF link annotation
    • https://cdn.sqhk.co/zopizote/ggham2t/pocket_world_3d_assembly_models_unique_puzzle_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_5fe92e786e752.pdfIn PDF document text
    • https://cdn.sqhk.co/fenogate/fjamjdq/44671328408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484631/normal_604a73e7a16aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444115/normal_5fe9b888afc40.pdfIn PDF document text
    • https://cdn.sqhk.co/wesaduleb/fhaEBgj/10308867037.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/XdweqkH/lisopenoxulep.pdfIn PDF document text
    • http://volomowoxe.22web.org/xetifomivelun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422879/normal_6025b0c18f6e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/65a5bbb5-cbbc-4757-9d12-14f4f775747f/vivuzetesere.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/power_pressure_cooker_xl_recipe_book.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/before_you_say_i_do_clare_lydon_epub_vk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891cb366-734b-40ac-881e-654e3368ed53/pugazarobigazeg.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/sorotixe.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/centrostyle_catalogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b9fb303-0545-4ddb-8f40-340debd1d080/88285831250.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/android_auto_cars_2017.pdfIn PDF document text
    • http://kodowen.rf.gd/byomkesh_bakshi_bengali_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/389e4023-319f-4af3-ba39-eb9da6c8f801/86919978599.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_off0000f048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF048 5804 bytes
SHA-256: 908c4da88fbc85ac4bbf6d573b2b16a364f2e8e23d91b7be0de386e050c734af
font_01_sfnt_off000103e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 10316 bytes
SHA-256: d3c1e0098a7cf54f57339828af9b8da3abd7b8250272a62c97f8cf53587a9f75

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