Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe95a07b5a2c34c3…

MALICIOUS

PDF

73.6 KB Created: 2021-04-13 18:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c574ac159797ebc918991d2f3b764af9 SHA-1: 213b8ab0710519f7d72984d10ae507dca1ba57df SHA-256: fe95a07b5a2c34c3c5ae0967eb085ba47225c421e0af791450c6f421f7609713
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URL points to a suspicious domain, suggesting it's a primary distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=no+game+no+life+zero+shuvi+wallpaper
    • https://lefawiput.weebly.com/uploads/1/3/5/3/135324435/ruwuve_kikaredosu_wekajobuvafox_xukarovorizozod.pdf
    • https://lasogevedona.weebly.com/uploads/1/3/1/3/131398076/6049903.pdf
    • http://moxilekulina.getenjoyment.net/gebixazo.pdf
    • http://fusekimutoxi.sportsontheweb.net/april_may_june_2020_calendar.pdf
    • http://vifezitenof.getenjoyment.net/57139717343.pdf
    • https://zadidiboz.weebly.com/uploads/1/3/5/2/135295834/1442997.pdf
    • http://chatik85939775.fun/best_way_to_learn_guitar_theory_reddit12f3q.pdf
    • http://marafonsport.site/xilaxanotaw0gix7.pdf
    • http://hangookoil.ru/379267399417k3u7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/makumapikeze/flinn_lab_safety_quiz_answer_key.pdf
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_01bf3653fe9d4aec8f8a829ef785356b.pdf?index=true
    • http://pabewuvuxaf.onlinewebshop.net/10546169397.pdf
    • http://wolobugoxew.myartsonline.com/astronomy_textbook_download.pdf
    • https://8c330184-3457-40de-b162-e34763a77ed1.filesusr.com/ugd/0aae61_ebab701d09b6410aabe8ba167bad5b93.pdf?index=true
    • https://827a6da4-a69c-4806-aaaa-db522494bc4d.filesusr.com/ugd/cb5916_6f3390ce07b34d8bb84b04c8cc15163a.pdf?index=true
    • https://s3.amazonaws.com/tosevud/rowimemepabidupajerofu.pdf
    • https://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_a79e5e40e7e549419ff2fcfd956a2ec8.pdf?index=true
    • https://s3.amazonaws.com/rawesaragegugar/86984931220.pdf
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_60bd0869160e4effa90c999f13b88e36.pdf?index=true
    • http://gumomexad.onlinewebshop.net/zonub.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_off0000e29e.bin
4826feffc01c1a83ed092089f3366dd532335d2cd58b6874fd88f73009d0ddd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 5488 bytes
font_01_sfnt_off0000f54a.bin
ac0e157d1a09061b8302b7161b02548793f7c6f85c17a99df5f220a387c16218		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF54A 10316 bytes

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