Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8d59d153be7f79…

MALICIOUS

PDF

56.0 KB Created: 2020-11-21 02:20:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be723bc5807da80be45111dd7b6d3568 SHA-1: d2b2abf3a3efb9dcf16c8d22fe713b8db8a3e437 SHA-256: ce8d59d153be7f79d291e7b76a0f44ece67e2fc8bcb058e9837b29e99e72c446
96 Risk Score

Malware Insights

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

The file is a PDF with a high ML classification score and a ClamAV detection indicating it is a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the malicious URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/123?utm_term=embedding+quotes+worksheet
    • https://cdn-cms.f-static.net/uploads/4413122/normal_5f944f32526c9.pdf
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f9c968ca5283.pdf
    • https://cdn-cms.f-static.net/uploads/4451208/normal_5fa6084c44ba7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tipakalif/fekefugakanosupeko.pdf
    • https://s3.amazonaws.com/lodunixodetum/rabbit_sniper_360.pdf
    • https://uploads.strikinglycdn.com/files/5944f2ed-100f-4180-8d5f-8eab1913c65e/45464444466.pdf
    • https://uploads.strikinglycdn.com/files/beb4e734-5e79-4003-a8c7-c6bdcbf16c1b/84046358865.pdf
    • https://uploads.strikinglycdn.com/files/bd014741-c774-483b-99a9-e1d2b5990897/southside28_record_producer29.pdf
    • https://s3.amazonaws.com/lodunixodetum/davavopelugativ.pdf
    • https://s3.amazonaws.com/ruzumeb/mugotigazonukopifufataf.pdf
    • https://s3.amazonaws.com/tapexiw/rawigomizujedem.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_off0000a3df.bin
29e5ac6b356caefb3cf839303e3046abc0b519db46323d64abd85be94db3608d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3DF 5376 bytes
font_01_sfnt_off0000b605.bin
103baeaeb30a4493b06b8ad233703442d0f3f1789f3899a44366311522ca7c0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB605 9148 bytes

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