Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0688bddd6b616a0…

MALICIOUS

PDF

72.3 KB Created: 2020-12-06 08:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d352123b1c5e0559741a296fdf155c83 SHA-1: 5d273712a9f5a490468e770c44e46754567f53d6 SHA-256: b0688bddd6b616a01c959969d3b1fdede1db87096c14cba7d753c3d408af2672
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 critical heuristic firing for ClamAV detection. An external URI, 'https://traffking.ru/strik?utm_term=syrup+for+bees+in+spring', was extracted, indicating a likely attempt to redirect the user to a malicious site. The PDF structure and embedded content suggest it is used as a lure, potentially for phishing or to download further malicious content.

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://traffking.ru/strik?utm_term=syrup+for+bees+in+spring
    • https://cdn-cms.f-static.net/uploads/4413712/normal_5f9486878be62.pdf
    • https://cdn-cms.f-static.net/uploads/4393181/normal_5f93127d7dd1a.pdf
    • https://cdn-cms.f-static.net/uploads/4496597/normal_5fb9d50fb2409.pdf
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f8726c432062.pdf
    • https://cdn-cms.f-static.net/uploads/4462046/normal_5fa2604f961d1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fc18c699698b02c7f25315b/t/5fc5084af3de5e49b503d5b5/1606748234485/78319880419.pdf
    • https://s3.amazonaws.com/piradi/blue_and_black_dress_answer.pdf
    • https://uploads.strikinglycdn.com/files/aeaea7fa-04bf-4d61-8675-ecefad1b8767/xosik.pdf
    • https://uploads.strikinglycdn.com/files/99838c6a-8631-488a-9a24-3afded17e199/27797332170.pdf
    • https://static1.squarespace.com/static/5fc10afc403f5353fd968892/t/5fc2199308845d0924d238a1/1606556052337/roruxuwe.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcefc2ef3361272aeab9a7/1606217666272/juwabewogixu.pdf
    • https://uploads.strikinglycdn.com/files/f7b7d935-ab0d-4cb3-95fd-4fb2ab8a7591/reviews_on_total_people_plus_vitamins.pdf
    • https://s3.amazonaws.com/zibenoroduzuw/issuing_common_stock_effect_on_balance_sheet.pdf
    • https://uploads.strikinglycdn.com/files/2fb5e69c-f99d-4dcb-bacb-73d5465da5a5/38956039888.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d227.bin
c4449628741edabf87026b10c71956edd4f2211e0001c2f00b9e7e59bd907641
pdf-font-stream PDF embedded font (sfnt) at offset 0xD227 4972 bytes
font_01_sfnt_off0000e316.bin
f9491aa3fa49c01a8c12e342589644af53b71560621da64a850f099a2dd54fe2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE316 10404 bytes
font_02_sfnt_off00010678.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10678 4324 bytes