Malicious PDF — malware analysis report

Static analysis result for SHA-256 405cd8004fc509ec…

MALICIOUS

PDF

78.7 KB Created: 2020-11-25 09:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 282856870b912d7b4a006e00571c498d SHA-1: eeb0a0b7f4ff936e2b7b18c6fcb31ada2b153f3c SHA-256: 405cd8004fc509ec6bd10d5db5a2675dc7021e2e4d61b2099d0ee7cb514d5a2d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'traffnew.ru', which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to 'Psicologia del exito pdf'. No scripts were extracted, but the presence of external URIs and the malware detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffnew.ru/strik?utm_term=psicologia+del+exito+pdf
    • https://cdn-cms.f-static.net/uploads/4373239/normal_5fac2cb82beb8.pdf
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f9a8301e539e.pdf
    • https://cdn-cms.f-static.net/uploads/4403413/normal_5fa2de5ad7eef.pdf
    • https://cdn-cms.f-static.net/uploads/4416331/normal_5fa69d38be569.pdf
    • https://cdn-cms.f-static.net/uploads/4417643/normal_5fa84af6744ad.pdf
    • https://cdn-cms.f-static.net/uploads/4490739/normal_5fb5d283f133e.pdf
    • https://cdn-cms.f-static.net/uploads/4416319/normal_5fb53569f032d.pdf
    • https://cdn-cms.f-static.net/uploads/4378171/normal_5f9b2c84ad8f8.pdf
    • https://cdn-cms.f-static.net/uploads/4382974/normal_5f9d25990e1b8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jukoxisojow/bhagavad_gita_simple_english.pdf
    • https://s3.amazonaws.com/sigobija/acl_reconstruction_rehab_protocol.pdf
    • https://s3.amazonaws.com/likadojivivofu/55495618411.pdf
    • https://s3.amazonaws.com/kofabube/zombie_gunship_survival_modded_apk.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_off0000f2fa.bin
8bc46dc90b4b5e7dd6d19e6a0bcf018eec73d48bf5bb3bf8243e673b80aa67eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FA 5296 bytes
font_01_sfnt_off0001051d.bin
26b3be47f919979e674177fc6923aff131c4bf6599c1cc79544e833b1af61dc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1051D 12604 bytes

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