Malicious PDF — malware analysis report

Static analysis result for SHA-256 281f1ca0630db9a7…

MALICIOUS

PDF

85.5 KB Created: 2020-11-23 21:30:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 880c26e931f9736772697f7c41900ed9 SHA-1: 77d5fdfc67fd753fa64343541cd28015f727fd67 SHA-256: 281f1ca0630db9a70466fb6d85482f23a78c3e4474b9a0cc5f715fb7bde6067e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to 'traffking.ru', suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit users through social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=cast+of+the+mask+of+zorro
    • https://cdn-cms.f-static.net/uploads/4402951/normal_5f9533d30a25e.pdf
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5058540.pdf
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/8315006.pdf
    • https://niruzezigup.weebly.com/uploads/1/3/4/8/134889773/nidazotukidi.pdf
    • https://xupotigoxurope.weebly.com/uploads/1/3/4/6/134657266/8a913.pdf
    • https://cdn-cms.f-static.net/uploads/4387825/normal_5f9db04c9b4b7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xenavuxa/certified_six_sigma_yellow_belt_handbook.pdf
    • https://s3.amazonaws.com/rizijubovapuk/84788888448.pdf
    • https://uploads.strikinglycdn.com/files/1efe4abe-234c-4c9c-a8fd-007f1b7a7838/adhisaya_mooligai_vasiyam_in_tamil.pdf
    • https://uploads.strikinglycdn.com/files/0d9c4c69-c471-464b-9f3c-54059a32989e/lapugiwulevobagive.pdf
    • https://uploads.strikinglycdn.com/files/f8846863-aec0-4c79-b661-9bf368a91364/98406413670.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_off00010e36.bin
e187aac4554c91f2a04ebb857e2e6b44b20ba16b83c85a81d0a5e14410aacad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E36 4992 bytes
font_01_sfnt_off00011f0c.bin
e59a589baf520f275d3e108204fecb3f73fe287c5e9dd6cbcce830e0fe329be1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0C 12808 bytes

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