Malicious PDF — malware analysis report

Static analysis result for SHA-256 64cacc9e1a44c1e9…

MALICIOUS

PDF

64.1 KB Created: 2020-11-20 06:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e452de51e8356b0d0a91c1eb4af4ba6e SHA-1: 925a967f8e41afc561367534394372f8b46be1db SHA-256: 64cacc9e1a44c1e946355ac730cce7f13eb6a31c9ce7e46008d11c12168e3f88
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs to a suspicious domain, likely serving as a lure for users to click. The document body, though heavily obfuscated, contains text that suggests a social link pretext. No scripts were extracted, but the presence of an external URI and the overall detection profile 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/123?utm_term=dojima+social+link
    • https://cdn-cms.f-static.net/uploads/4402244/normal_5f991d944e10a.pdf
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f875b5a7d12f.pdf
    • https://tolazekujulom.weebly.com/uploads/1/3/4/6/134668849/66320d98b2.pdf
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5f8afc35a5f2e.pdf
    • https://nujamoxe.weebly.com/uploads/1/3/4/2/134234607/gapasik.pdf
    • https://jiketajaw.weebly.com/uploads/1/3/4/4/134464131/8234530.pdf
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/jatelu-zukolugaw.pdf
    • https://tosofovopige.weebly.com/uploads/1/3/3/9/133998067/66decbd84bda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tokafanawa/lobozabejew.pdf
    • https://s3.amazonaws.com/megodipewukitoj/career_interest_inventory_test.pdf
    • https://s3.amazonaws.com/wulagisi/6431542212.pdf
    • https://s3.amazonaws.com/dazifozixawus/karefijelokoboriwoke.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b358.bin
6d0f926ede36a77eed2f0217a53f241a1f97ac64936c25d716fd0cc2eec17987		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB358 4576 bytes
font_01_sfnt_off0000c2be.bin
9dcf67d0d3d27934188cb88485a134517a18da8777ff81aa2a278ca19283c410		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BE 10264 bytes
font_02_sfnt_off0000e5f1.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F1 4324 bytes

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