Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4e671ada674c4a…

MALICIOUS

PDF

76.4 KB Created: 2021-04-09 07:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8167b5b7a91f3e986710200c1c103270 SHA-1: f1379f106a2be91a545ff2af63693507ab7f140f SHA-256: dd4e671ada674c4a2b9f266d5d2ff671079ffbd5277f1c8430fe0a100e32ac29
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with the primary one being 'https://xezojetit.ru/strik?utm_term=cub+cadet+lt1050+starter', suggesting it's part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to product information, aligning with common social engineering tactics.

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://xezojetit.ru/strik?utm_term=cub+cadet+lt1050+starter
    • http://mosiruduv.22web.org/vehicle_air_conditioning_system.pdf
    • http://nominasacra.ru/47052433779t9egk.pdf
    • https://nunokewapi.weebly.com/uploads/1/3/5/9/135961733/3936432.pdf
    • http://julivojurukumu.sportsontheweb.net/add_text_to_adobe_9.pdf
    • http://toxebugusopasur.22web.org/lab_equipment_names_and_functions_answers.pdf
    • https://ranezilipevag.weebly.com/uploads/1/3/5/3/135392607/muxowalokevebemad.pdf
    • https://cdn-cms.f-static.net/uploads/4454168/normal_6059ab2695595.pdf
    • https://tusopapa.weebly.com/uploads/1/3/2/7/132712380/5074783.pdf
    • https://cdn-cms.f-static.net/uploads/4367300/normal_60138ed4e9bb6.pdf
    • https://cdn-cms.f-static.net/uploads/4482849/normal_604feb38b31a3.pdf
    • http://izzzaaa.space/memorandum_of_understanding_template_between_two_partiesh8kdz.pdf
    • https://vajepixujilujed.weebly.com/uploads/1/3/4/3/134331233/jibavetabiwaxu_porixuguzi.pdf
    • https://cdn-cms.f-static.net/uploads/4465015/normal_6015c56f9402a.pdf
    • http://mudemofe.iblogger.org/84783707190.pdf
    • http://feremujidonigu.getenjoyment.net/fundamentals_of_medicinal_chemistry.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ximawefab.epizy.com/ge_profile_over-the-range_microwave_convection_oven_installation.pdf
    • http://fevejalamozek.epizy.com/kamegosenigerever.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed26.bin
ff4c2015c0cd445f1386d567bd4ba95ad67af4975f74b5128dc344f9dda62f53
pdf-font-stream PDF embedded font (sfnt) at offset 0xED26 5296 bytes
font_01_sfnt_off0000ff31.bin
f7b0f1510a9a356642c190e2050f0c2184c106948e0df23991f9610082348945
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF31 11148 bytes