Malicious PDF — malware analysis report

Static analysis result for SHA-256 4125533054712962…

MALICIOUS

PDF

70.4 KB Created: 2021-02-19 13:10:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ca5f867c8f3e66886d3cf3c92c554d9f SHA-1: 9b4e74bab007f6ed59cc3d8bbbc4b4adff78bb7c SHA-256: 4125533054712962ae1484532b6e6a19eca9d6b20ce5de4f6baf94536a35e1a5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or malware distribution scheme. The ML classifier and ClamAV detection confirm the malicious nature of the file, likely exploiting a vulnerability to execute code or present a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://baarspo.ru/strik?utm_term=french+revolution+vocab+quizlet PDF link annotation
    • http://opendouche.xyz/penirojawipimoworojofoyou3n.pdfIn PDF document text
    • http://kamini33.ru/dugefejazevorifaz19sr7.pdfIn PDF document text
    • http://korecos.ru/souq._com_egypt_phone_numberh4sbt.pdfIn PDF document text
    • http://belkwigs.com/musurebosunulorupo3elk5.pdfIn PDF document text
    • https://cdn.sqhk.co/letonolomo/Yjgihie/cartoon_video_editor_for_pc.pdfIn PDF document text
    • http://waystep.site/lijunajitopezefagbnr9h.pdfIn PDF document text
    • http://idealslim-ordina.site/machine_gun_preacher_2011_full_movie2920t.pdfIn PDF document text
    • http://unosital.space/nilajulilu5qhhp.pdfIn PDF document text
    • http://amsidgi.xyz/68404553264nfie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5fe18ed40e456.pdfIn PDF document text
    • http://itclick.pro/rerimikaleloronjqk1n.pdfIn PDF document text
    • http://haustova.com/juxawiludoc7g7.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/WKbk59s/94939380484.pdfIn PDF document text
    • http://sberbank.services/get_police_report_chicago87hji.pdfIn PDF document text
    • http://farvestnn.ru/the_monster_movie_in_tamil5pnjk.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/jRV1Kt7/paper_rings_taylor_swift_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/bisadidizi/aIcjbqI/mynba2k20_global_pattern_september_12.pdfIn PDF document text
    • http://daisywobzr.rest/3760106842643iqc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dupikupujetilu.rf.gd/exide_lithium_ion_battery_datasheet.pdfIn PDF document text
    • http://ponuruv.rf.gd/81311604401.pdfIn PDF document text
    • http://zipojadutaxu.epizy.com/jack_reacher_2_trailer_english.pdfIn PDF document text
    • http://segalufosirinep.epizy.com/37072992376.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C3 5040 bytes
SHA-256: 4e531bc05ee90cfc541cbda9b8566444152cc093cd129d326585ceb9071c3d75
font_01_sfnt_off0000e8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F9 10452 bytes
SHA-256: 6850bfb7c023cca6b778792c6c84394560e8df34279c877a948cb7e646dcfcca

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