Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc389875506d252c…

MALICIOUS

PDF

76.0 KB Created: 2021-01-14 22:51:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 198351f2cf60aeaf49d129de9f1e1736 SHA-1: ecd86a923e272a5c4a57284332ceb0cf5d5a2cba SHA-256: dc389875506d252c6a1a7e0c0a6618fe7a057ee06049fd6c940f9c6a774b9a1f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This, combined with ML classification and ClamAV detection, strongly indicates malicious intent. The embedded URL is likely used to lure the user to a phishing site or download further malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/aws?utm_term=2008+bmw+m5+manual+transmission+for+sale In PDF document text
    • https://static.s123-cdn-static.com/uploads/4459166/normal_5fcbe08e1738d.pdfIn PDF document text
    • https://site-1215232.mozfiles.com/files/1215232/rapujagura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406806/normal_5fb83f7db824e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f9dbb562bc79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467975/normal_5fb6e6256b97a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5fb3c680b8fc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370057/normal_5fe4706bd8bef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5fad6ff7205f4.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/sizadagazagaj/20065131706.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/75896954166.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/cloudformation_stack_template_example.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_off0000e90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90A 5640 bytes
SHA-256: 562c3ea4d38d8d1f379ad280567527773512c4b80924b489cea7ff1e5d20454d
font_01_sfnt_off0000fc3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3D 11344 bytes
SHA-256: c411d4496f497d07ea0b718e6f889db91e4b8a06236532a14a4f56d9fb7afeea