Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd3b42329c94fa7…

MALICIOUS

PDF

60.6 KB Created: 2020-11-22 13:54:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 837e71ad17da8094825278a9dd47378a SHA-1: d6cffa4101a3ade78c9458024410318e2143cab2 SHA-256: 1dd3b42329c94fa76d36cafa731d6f008bb04af77d9410f033256ac1756ba514
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to reference a 'paranormal activity vr game guide', suggesting a social engineering lure to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/123?utm_term=paranormal+activity+vr+game+guide
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5fb2c59c34f31.pdf
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8a1e607e6e6.pdf
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5f8e19c2f2838.pdf
    • https://cdn-cms.f-static.net/uploads/4415331/normal_5f96889b08097.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/47e45411-c8f5-416c-9b3c-bf5061c4ad90/70991308016.pdf
    • https://s3.amazonaws.com/zirojopemup/dotewiwesowokobutozuw.pdf
    • https://s3.amazonaws.com/livivuvuwugeb/88929129049.pdf
    • https://uploads.strikinglycdn.com/files/e4fbc9e3-53bf-4e4f-a575-1cf2531d2fb0/5342036401.pdf
    • https://s3.amazonaws.com/lewuli/consonant_and_vowel_chart.pdf
    • https://uploads.strikinglycdn.com/files/27889821-55eb-4227-9716-1a28ab1b7f3c/toys_pop_pop_pets.pdf
    • https://s3.amazonaws.com/fixararololu/19031587851.pdf
    • https://uploads.strikinglycdn.com/files/d152ca3e-b11d-45e7-b216-ab3f374c3b7c/89653580736.pdf
    • https://s3.amazonaws.com/fasomusogapovi/60465236057.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_off0000b26d.bin
d99e4cfa1731ca7db26e3ca98603e35f38b509fc2b18f968f80cf7913ae5c28f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB26D 5244 bytes
font_01_sfnt_off0000c439.bin
0e850b7d4484e57c9817078501495831452170cd6d2911431bd12693648b27e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC439 9720 bytes

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