Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c468f62e6c5280f…

MALICIOUS

PDF

79.9 KB Created: 2021-05-02 02:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2e159b8280ae466abcbc0cef4bbd977a SHA-1: 26bbeb9dac42377306eb8bc63e7252dd9acec29f SHA-256: 3c468f62e6c5280f2a2e23b2cb02fd5adf1bf783ff560b0a2b0ac7f62b829210
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'zajinet.ru', which is presented as a search result for 'What are the best neck exercises'. This suggests a phishing or social engineering lure. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=what+are+the+best+neck+exercises PDF link annotation
    • http://drenajkrasnodar.ru/domopilatukokosobugojagamvanes.pdfIn PDF document text
    • http://devlp.design/221b_baker_street_game_bookhhwej.pdfIn PDF document text
    • http://wbigs.space/sauti_sol_video_songsd0v66.pdfIn PDF document text
    • http://betmoy57.com/jigogodisojadq0dwm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/guzikataz.pdfIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_8959457d01564a51a8d235ac126d3f1f.pdf?index=trueIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_ea36f73033d649649cd367872174427f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/vmware_certified_compatibility_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/zikedamavanutapoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1472ff-df7d-44bf-8117-fa3ac618a552/rene_descartes_meditations_objections_and_replies_summary.pdfIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_e45727b5cf9d4bf186d13b042066df96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/19203343845.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/behavioral_questions_and_answers_for_interview.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/latest_chinese_movies_dual_audio.pdfIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_f846e12e75cd477b9bc21919db75663e.pdf?index=trueIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_b571693b60c3416daa3c599e6e6ae94e.pdf?index=trueIn PDF document text
    • https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_856fdf91b2be4170bdbaf8b0aa0909e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b717f3d7-09cf-41a7-9d5e-df2cdf4f1fb1/uppababy_mesa_car_seat_remove_from_base.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/spotify_music_on_computer.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_d90a1dffff2f4605ab969a4c6a7ee488.pdf?index=trueIn 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_off0000fb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB92 5140 bytes
SHA-256: 235c7e7c7111c547f80193c234fb2656f1a1d48f1e497e2496033c1872fd6c85
font_01_sfnt_off00010d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D19 10916 bytes
SHA-256: 692448eec81159899098f314ec8f88ab6a5edaf73387969b01bbf69fab506e1c

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