Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ae9eda1d1a404e…

MALICIOUS

PDF

66.8 KB Created: 2021-04-04 02:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba70008b9d84c7e2fbb37ec795871ad8 SHA-1: 59a7f1d0bf270411dbc27d636b78a0299be076b2 SHA-256: a7ae9eda1d1a404eb697feae57c0d5becc087c916a33962828d3953a2f267044
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple suspicious and invisible links pointing to external domains, with one specifically identified as a lure for a malicious PDF download. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and the ML classification support a high confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://nipisod.ru/strik?utm_term=how+to+replace+ge+gas+stove+top+igniter
    • https://static.s123-cdn-static.com/uploads/4444386/normal_5fee189da883d.pdf
    • https://static.s123-cdn-static.com/uploads/4487381/normal_5fc6f21931efa.pdf
    • http://afracheat1.xyz/44029816875mewp3.pdf
    • https://cdn-cms.f-static.net/uploads/4461219/normal_602e211ca3d4e.pdf
    • http://paganel.world/zokoje3piau.pdf
    • http://center-san.ru/cognitive_behavioral_therapy_judith_beckvhvdb.pdf
    • http://securityofusersdevicesonline.site/fudimuwufofugajipawafapoppn1eg.pdf
    • http://playmarket-online.com/airlift_performance_windshield_bannerwisoc.pdf
    • http://everydays.space/ado.net_interview_questions_and_answers_for_2_years_experienced2m4ca.pdf
    • http://ru-dev.xyz/easy_guitar_tabs_for_beginners_acoustica3g56.pdf
    • https://cdn-cms.f-static.net/uploads/4388283/normal_605ee9d628ce8.pdf
    • http://picsonair.com/matanawizekawesufuxu6xufe.pdf
    • http://gk-kuban.ru/visual_studio_2013_ultimate_crack_keyc19eq.pdf
    • http://electriccannoz.club/can_swing_trading_be_profitable19tue.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mubefula/givopidapevopewo.pdf
    • https://s3.amazonaws.com/matogapibelifiv/aso_sent_lagao_mere_raja_song.pdf
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_4be8443138d64da89e89b78f5fb0c767.pdf?index=true
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_4186c594d5974519b0c178f7ba80f8b9.pdf?index=true
    • https://s3.amazonaws.com/somamere/dokewevobigazijatomus.pdf
    • https://s3.amazonaws.com/gujutavevive/aluminium_alloys.pdf
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_0ffe7cc229fb45a3a5b189e8ffec89da.pdf?index=true
    • 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_off0000c9e0.bin
bfb2cec6efce67e25bcc860a706290d8ae9cc755d9c8f46cd60036736cc56997		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E0 5212 bytes
font_01_sfnt_off0000dbc3.bin
47020958694c563e97f57b07e28e432ab470b2f26706336c94b98d1d988ad714		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC3 9996 bytes

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