Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07b64f84a9bc122…

MALICIOUS

PDF

65.9 KB Created: 2020-11-21 20:45:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fca519dc8afa3af04af77610d9abc580 SHA-1: 90930c8f7531f956c8f8c9c44cd01321211d812f SHA-256: c07b64f84a9bc1223912fd5f33a87d9d2a8ed96c1a1dfbb0abebf07b07c283d1
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to 'flow control valve pdf'. The presence of an external URI and the overall detection by multiple security tools indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffe.ru/123?utm_term=flow+control+valve+pdf
    • https://cdn-cms.f-static.net/uploads/4382405/normal_5f8fe8cb7e8f3.pdf
    • https://cdn-cms.f-static.net/uploads/4475864/normal_5fad819755451.pdf
    • https://cdn-cms.f-static.net/uploads/4402745/normal_5fb614d608c34.pdf
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5f8b997fab995.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tetenifeme/dr_michael_mellman_boynton_beach_florida.pdf
    • https://s3.amazonaws.com/risisipajole/acog_endometriosis_treatment_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/15e22eab-1be3-49f1-94b2-e46a9e11f35c/42533384951.pdf
    • https://s3.amazonaws.com/rekawexuretowo/free_fake_texting_online.pdf
    • https://s3.amazonaws.com/donarepemi/ncip_fpic_guidelines.pdf
    • https://s3.amazonaws.com/lodunixodetum/40091360173.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_off0000c64b.bin
8a1f8297493f9646a3a438e6081ccc89e7e17b2ca5214d75dc3fe58888970395		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC64B 5076 bytes
font_01_sfnt_off0000d7bd.bin
cf6ac91b1412caa8793f8e0b2f27a9e2b5856835e36b9e7324a1c5617c6710d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BD 10452 bytes

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