Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3fae78616b010f…

MALICIOUS

PDF

73.9 KB Created: 2020-12-21 07:14:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddb062d0a5df83c27d5e3764b9e6d57e SHA-1: 59e024bc88121fad678dc795a6875811597ce436 SHA-256: fa3fae78616b010faf24b33de973c2b829e432e2ad1e5425512f230a76823f7f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the embedded URL is the primary indicator of a phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=loudoun+county+animal+shelter+donations
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f91292b5e6ee.pdf
    • https://static.s123-cdn-static.com/uploads/4393208/normal_5fcd1f8b26543.pdf
    • https://cdn-cms.f-static.net/uploads/4377102/normal_5f9e6024cdec5.pdf
    • https://cdn-cms.f-static.net/uploads/4480880/normal_5fd2a6cf6b3e8.pdf
    • https://cdn-cms.f-static.net/uploads/4390323/normal_5f9ed76c3e70f.pdf
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5fac070cd03eb.pdf
    • https://fijegude.weebly.com/uploads/1/3/4/8/134850985/8780486.pdf
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/penatotusiri.pdf
    • https://static.s123-cdn-static.com/uploads/4479707/normal_5fc3d487cd105.pdf
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f9f63a4bcd6e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pewibim/ringtones_en_espanol_gratis.pdf
    • https://s3.amazonaws.com/didowugorokirug/66041576644.pdf
    • https://s3.amazonaws.com/kagedatabujo/17495044944.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc6d.bin
10783793ff2eafe55ea4275494c23f31c4df8ab0bcf04b7c96b8a52aea532b0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6D 5220 bytes
font_01_sfnt_off0000de0c.bin
0596fc9f3d06eb4a9906591dc0bee4dd37b3cb264f1ae2b8b9bff614271ca0db
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0C 11524 bytes
font_02_sfnt_off000104ec.bin
c2f1b8e27e4c5d1eb6694bcf999bed56489d599ed66a9b176e3ad865fa2ee921
pdf-font-stream PDF embedded font (sfnt) at offset 0x104EC 16232 bytes