Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a459f859d097f6…

MALICIOUS

PDF

76.8 KB Created: 2020-12-31 06:05:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27300d64b8d30682d7881825b6d4d28b SHA-1: d4ad47768621816fa5fdf0a09088974ed74b6d67 SHA-256: e2a459f859d097f628dd57136e268b2793bf2fe909b8f40f149faf3a361c7d61
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV and an ML classifier as malicious. It contains an embedded URI pointing to 'https://trafficel.ru/123?utm_term=gates+bbq+menu+state+line', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text fragments that might be part of a lure. The PDF structure itself has some anomalies, but the primary threat appears to be the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://trafficel.ru/123?utm_term=gates+bbq+menu+state+line
    • https://cdn-cms.f-static.net/uploads/4450040/normal_5fad515e52480.pdf
    • https://static.s123-cdn-static.com/uploads/4419626/normal_5fc7d35b8fbba.pdf
    • https://static.s123-cdn-static.com/uploads/4489593/normal_5feccf7755f24.pdf
    • https://cdn-cms.f-static.net/uploads/4392474/normal_5fdabc1a38a10.pdf
    • https://static.s123-cdn-static.com/uploads/4486775/normal_5fc82a9eb9a5e.pdf
    • https://cdn-cms.f-static.net/uploads/4420036/normal_5fd1729916238.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bupijila/metofiwusokurivepuf.pdf
    • https://uploads.strikinglycdn.com/files/76cebcdf-751d-49c9-b0df-33d445606bb8/winwing_space_shooter_mod_apk.pdf
    • https://s3.amazonaws.com/foneniz/quarterly_exam_answer_key_2019_physics.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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000df38.bin
0d101743e63bbfaed435cc65a98bb6d4d2e974669be4a95548a852d1b800745a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDF38 12156 bytes
font_00_sfnt_off0000ce31.bin
b867fa807e80896f2b909eb82bf69f5741fa8ca69c069c0961af84179ee18511		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE31 5032 bytes
font_02_sfnt_off000101b9.bin
319a8715e20c3ca435532c6c426f56f6449ba7f4bac901e15bd5cdff2000baad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101B9 10848 bytes

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