Malicious PDF — malware analysis report

Static analysis result for SHA-256 f646f739ca95a85b…

MALICIOUS

PDF

88.8 KB Created: 2021-03-14 09:13:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59624a863c8474ebc875788a0eb21060 SHA-1: 3a16d567074e6cc8a92854525c8f4e0b53302ae2 SHA-256: f646f739ca95a85b2e0db56e46d2eda29e02170030bf49a95b6b29b8fc54b149
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, likely intended to lead the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit the user's trust through a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://jacksth.ru/strik?utm_term=como+mandar+solicitud+de+novio+en+facebook
    • https://static.s123-cdn-static.com/uploads/4463277/normal_5fdf1f61bdb87.pdf
    • https://cdn.sqhk.co/tatidukigag/gdENhay/minecraft_build_the_earth_server_ip.pdf
    • http://kifenefazujiz.iblogger.org/92114923523.pdf
    • https://cdn-cms.f-static.net/uploads/4413693/normal_6044688523cb5.pdf
    • https://cdn.sqhk.co/tuturuno/rFgUYjh/ripofapoxojiperi.pdf
    • https://cdn.sqhk.co/raxuzuvuluf/hLggchd/wupuma.pdf
    • http://rolevuses.iblogger.org/model_3_long_range_performance_boost.pdf
    • https://cdn-cms.f-static.net/uploads/4465128/normal_602451a97d7e8.pdf
    • https://static.s123-cdn-static.com/uploads/4415077/normal_6009acebe97a3.pdf
    • https://cdn.sqhk.co/wejagamewo/jgKdMic/top_marketing_firms_in_san_diego.pdf
    • https://cdn.sqhk.co/tinolefowi/hihiahf/94258467180.pdf
    • http://nufapivevavenak.22web.org/dovevodalumavinexaneme.pdf
    • https://cdn-cms.f-static.net/uploads/4368788/normal_60252ac45bbd9.pdf
    • https://static.s123-cdn-static.com/uploads/4366339/normal_5fdcfa8d74960.pdf
    • https://cdn-cms.f-static.net/uploads/4463808/normal_60275479bf00f.pdf
    • https://cdn.sqhk.co/wumerelup/hhfjdfw/wsdot_traffic_alerts_twitter.pdf
    • https://cdn.sqhk.co/xovujiroveg/jboGpeR/46509025736.pdf
    • https://cdn-cms.f-static.net/uploads/4382201/normal_5fe999e9e70a5.pdf
    • https://cdn-cms.f-static.net/uploads/4381090/normal_601ef4fe3edd5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xupudajiwozov.epizy.com/picsart_premium_apk_2019_junio.pdf
    • https://s3.amazonaws.com/fotepopunaj/5448627626.pdf
    • https://s3.amazonaws.com/wutezigojuxi/net_working_capital_balance_sheet_analysis.pdf
    • https://s3.amazonaws.com/fusopoxipo/33544600915.pdf
    • http://sojoramuf.epizy.com/13485814238.pdf
    • https://s3.amazonaws.com/degagaziv/current_heart_and_stroke_cpr_guidelines.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_off00010ccf.bin
3f32c1055250a93eac0258e3342187d65b8af2cb501960c39a54c82c01033220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCF 5336 bytes
font_01_sfnt_off00011ee3.bin
58debbc5a19ed7a29dfdcbd30dfc6b8d4316dd0cf7891203d2b862661239652d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE3 12104 bytes
font_02_sfnt_off000145ab.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145AB 4324 bytes

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