Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c88f11bef2e6e8…

MALICIOUS

PDF

64.6 KB Created: 2020-12-28 14:45:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1aa2485ee22512b4aa2de6119160f91c SHA-1: e3b9c900b73393235e9dd91d0f3d33e7b63fb120 SHA-256: 27c88f11bef2e6e82b544b265ec9f6b109f6e9a11c1fc7c31e6a9df174978034
94 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. It contains an embedded URI pointing to 'traffset.ru', which is likely a malicious domain used for delivering further stages of an attack. The document body, though heavily corrupted, contains text related to 'easy printable crosswords', suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9677

Heuristics 3

  • 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
  • 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/strik?utm_term=easy+printable+crosswords+for+beginners PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471474/normal_5fc5703675d0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458390/normal_5fab8b7682aa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454280/normal_5fb61ffc1fc37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383586/normal_5fe43bd77f711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_5f9479b530755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393034/normal_5fd895ea9cc7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449968/normal_5fc30826e4f61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492536/normal_5fdc32de5dc22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f87b0b4b9df5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5fbcadf37c501.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefb6213-d2ff-4008-9472-54b0adc33627/noruvogoderifipifenirilaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34a14e46-4506-4442-bcf6-dd86ee89d8a9/alternate_start_mods_skyrim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed46a032-0b66-439a-ba0a-1dfe17e01aaa/xugavojeporiwipulak.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9C 5616 bytes
SHA-256: 798f293257e5c46bd9fcdee826bd5edb330983361e30f2b32e9bc904bf2e469a

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