Malicious PDF — malware analysis report

Static analysis result for SHA-256 035caba5dac897a9…

MALICIOUS

PDF

86.8 KB Created: 2021-01-13 11:14:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c7a50e4bfd0eb1453fe467cb9a3ddc66 SHA-1: 16e6523e1484b962fe107816151eb7760815ccfe SHA-256: 035caba5dac897a9cc46979c2a42116de957935d9d60970aa8de294783fc5eaf
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. It contains an embedded URI pointing to 'traffset.ru', which is likely used to host a malicious payload or redirect to a phishing site. The PDF structure itself does not contain readable content, suggesting it's designed to exploit vulnerabilities or deliver a secondary payload.

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://traffset.ru/123?utm_term=krav+maga+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413242/normal_5f95a48371315.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/jggh0gd/13995741416.pdfIn PDF document text
    • https://site-1174038.mozfiles.com/files/1174038/25853426551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459162/normal_5fe878181f022.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/hKgidWm/dead_wallpaper_4k.pdfIn PDF document text
    • https://site-1168145.mozfiles.com/files/1168145/autozone_auto_parts_appleton_wi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390071/normal_5f92f885bfb02.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/c0Hihge/63323476848.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/gfJjj8w/super_mario_run_unblocked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470830/normal_5ff53031d3d8c.pdfIn PDF document text
    • https://site-1178643.mozfiles.com/files/1178643/buzovozerekuboweda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f95b10227675.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/bokofapig/1088344586.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_off000116a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A6 5180 bytes
SHA-256: 3e7194568c0b0a5d093b9ee4f16c219278c63e9a424929a132d35d7d7b3bc20e
font_01_sfnt_off00012840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12840 11608 bytes
SHA-256: e50bef71158d612ff4739cbe9126180551e42be3f6482528019bffee86c2fe90