Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8c91e14b19e7a0…

MALICIOUS

PDF

68.1 KB Created: 2021-02-22 07:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3129fabbca33ec7547ec2cd1daef5306 SHA-1: a6c2e0060c3f5200bc5e073732f880aac828d3ac SHA-256: 9a8c91e14b19e7a098400c2b2beedfb18ba14f338ea350784035ff4e006df8eb
96 Risk Score

Malware Insights

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

The file is detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that leads to a domain associated with malicious activity. The document body, though heavily obfuscated, suggests a lure related to a world map, which is likely a pretext to drive users to the external URL.

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://leonvi.ru/strik?utm_term=picture+of+the+world+map+showing+the+seven+continents PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384307/normal_6015d338431ad.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/ifXUjjw/33818161655.pdfIn PDF document text
    • http://trokot-tonirovka.online/kabigulerixezodov2eg47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_6021117b02de7.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/xihgYxz/science_book_class_9_ncert_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/Ljcmjag/battlehand_heroes_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/xasomegupur/eib6ghK/micro_mechanic_compatible_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/jg4wMhj/run_sackboy_run_ps_vita.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/hhgjCoa/jovexep.pdfIn PDF document text
    • https://cdn.sqhk.co/fosulavale/hic1hju/miwolubesekegatulifajimog.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/luborinizu/clear_chunky_heel_platform_sandal.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/editable_memes_template_2019.pdfIn PDF document text
    • http://xumomevafuvozup.rf.gd/40983833001.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/53896263900.pdfIn PDF document text
    • http://zitilidi.rf.gd/56625572649.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_off0000cb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0E 5720 bytes
SHA-256: 67614d9b348708092bbef670d2d20e86fedff93fcfc6bf2e75684e2321ef2e4e
font_01_sfnt_off0000de77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE77 10756 bytes
SHA-256: e53b3ced75afbc8fc96609f1955a79f5db9c2730af869d25efd73455b8829555