Malicious PDF — malware analysis report

Static analysis result for SHA-256 592d39c83600155e…

MALICIOUS

PDF

69.4 KB Created: 2021-02-16 06:15:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 16333dd42dde4c4bb33f043076463126 SHA-1: 84067d60443e9f35c03f89fd18f41cb34a4da135 SHA-256: 592d39c83600155e447422170f8bbb203b027f95ba3da313421736511468db6f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and the ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'content writing jobs online India', suggesting a lure to trick users into visiting the external URL. No scripts were extracted, but the presence of external links and high detection scores point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=content+writing+jobs+online+india PDF link annotation
    • https://cdn.sqhk.co/pilozarager/ryi4jix/ice_cream_in_a_bag_without_cream.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/hbjimgd/79275302008.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401971/normal_5fff7e06bf966.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404123/normal_5fecbb457cd5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407102/normal_6003c49579d22.pdfIn PDF document text
    • http://hookup153.online/bometoguammk0.pdfIn PDF document text
    • http://sinoniwim.22web.org/why_did_arthur_die_merlin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379487/normal_5fdf1448f244b.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/bawalidamovidud/rekovoxijoguzelowezil.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/texas_used_car_buyers_guide_form.pdfIn PDF document text
    • http://kifofok.epizy.com/9591757564.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/81714889116.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/18555789302.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_off0000d416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD416 5208 bytes
SHA-256: dacdbe0ed5ba710a2b79ee94956baffecd783b7c1da82c780b9724515341ec37
font_01_sfnt_off0000e5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E5 10320 bytes
SHA-256: 4f3687d4810a52901f5400cc0d7172255d319abf8632962f8ec6b8dbe2e444cb