Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fba8f427c8c208…

MALICIOUS

PDF

74.0 KB Created: 2021-06-07 22:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbd8aa3b78b3447438b2f9c00f357674 SHA-1: dd752c1849f45141a38936a5e33f67d98367cd01 SHA-256: 29fba8f427c8c2089f8535edbad80d98b6a74cacfd7ed0643c7a2df14503edd3
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to lead users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nomylo.ru/pbw?utm_term=how+much+does+a+compliance+officer+make+in+canada
    • https://zuwuroxiver.weebly.com/uploads/1/3/1/0/131070979/45b8bbb95c70033.pdf
    • https://cdn-cms.f-static.net/uploads/4426675/normal_6056bf1010dfd.pdf
    • https://cdn-cms.f-static.net/uploads/4418197/normal_605b6a5feb087.pdf
    • https://cdn-cms.f-static.net/uploads/4474448/normal_606bf31a80075.pdf
    • https://motubisirewu.weebly.com/uploads/1/3/4/5/134529252/futelifetigina-zifaxoso-fadejotom-japiruduribim.pdf
    • https://cdn-cms.f-static.net/uploads/4401716/normal_600fbf967a09e.pdf
    • https://static.s123-cdn-static.com/uploads/4443598/normal_5fecf01010f95.pdf
    • https://gajinuware.weebly.com/uploads/1/3/4/5/134597963/1159147.pdf
    • https://cdn-cms.f-static.net/uploads/4443342/normal_60bd16bb56f22.pdf
    • https://muxilakenakujud.weebly.com/uploads/1/3/4/0/134012833/7349503.pdf
    • https://rigopijifotifat.weebly.com/uploads/1/3/2/6/132695828/patux-sivilowabizedo-zajobibawexif-jogunipila.pdf
    • https://cdn-cms.f-static.net/uploads/4403817/normal_603e777f9422b.pdf
    • https://static.s123-cdn-static.com/uploads/4451228/normal_5fe35224d1229.pdf
    • https://cdn-cms.f-static.net/uploads/4444104/normal_60bb4033152a4.pdf
    • https://static.s123-cdn-static.com/uploads/4370740/normal_6007de1755927.pdf
    • https://cdn-cms.f-static.net/uploads/4417830/normal_60312e95d65eb.pdf
    • https://static.s123-cdn-static.com/uploads/4495839/normal_5fc7b25053530.pdf
    • https://cdn-cms.f-static.net/uploads/4391909/normal_605f9b410c014.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ee71cb8a-3fc0-4847-9df5-658a9d1d38d3/mini_cooper_warranty_south_africa.pdf
    • https://uploads.strikinglycdn.com/files/609a3d0a-a4b7-4fc5-9b1a-b12e04a6eb09/kojovux.pdf
    • http://pugaxigodaka.pbworks.com/w/file/fetch/144444075/intersecting_chords_theorem_questions.pdf
    • http://demopefo.pbworks.com/f/33721664006.pdf
    • http://mosijiv.pbworks.com/f/gta_5_android_mobile_requirements.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_off0000e382.bin
b029aee120ff763a1113cdb7ff490dc91f311b8dd24b1b11135a14674a2e21ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE382 5512 bytes
font_01_sfnt_off0000f628.bin
b25a7d4d8468aa1fe387afc21596bd5a590b6dad9744de8153862637cf26be54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF628 10464 bytes

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