Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42aecc863255ab9…

MALICIOUS

PDF

147.7 KB Created: 2020-11-12 21:34:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2c610731fc343935bcd5f3a0a8c8fb5 SHA-1: 4d6601cb37756aedd358001c5492884238a29f19 SHA-256: d42aecc863255ab95a2db71e3fcd27349128ee5f40782bdc66b4d960a71e18d1
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users through a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://traffine.ru/aws?utm_term=boost+your+vocabulary+4+pdf
    • https://veforolafumokiv.weebly.com/uploads/1/3/4/3/134340642/siladezuberigene.pdf
    • https://rusokupos.weebly.com/uploads/1/3/4/4/134468665/a2b1d2eff1.pdf
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f8e0b00d38df.pdf
    • https://cdn-cms.f-static.net/uploads/4386836/normal_5fad69c57e357.pdf
    • https://fulafokowezoje.weebly.com/uploads/1/3/4/3/134384829/wuxule_getuvasibo_busesidijewi.pdf
    • https://cdn-cms.f-static.net/uploads/4383923/normal_5f9b706219635.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jamokaroxoj/yoshiko_kawashima.pdf
    • https://s3.amazonaws.com/modowor/rwby_map_of_mistral.pdf
    • https://s3.amazonaws.com/xafaxotaful/poisonous_snakes_in_oklahoma_city.pdf
    • https://s3.amazonaws.com/firudegix/pueblo_city_schools_district.pdf
    • https://s3.amazonaws.com/henghuili-files/19621039560.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_off0001f3ab.bin
dbdf2da7ddccd6b69b4bd59a01455760898fe987af93adff520ac8314aaacca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F3AB 5588 bytes
font_01_sfnt_off000206d0.bin
af7252c5bfdc36a6112da6893319292b7b0525379f979eed50023356666314fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x206D0 19264 bytes

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