Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e623a907846029…

MALICIOUS

PDF

72.5 KB Created: 2021-03-15 06:28:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9107f6a978c7368f21aa781babe1b90a SHA-1: d6ff5f13ac2ea70e71b4f5540a8fb361f5b8ac3c SHA-256: 86e623a9078460298107ec8f06d2a44dfab96cd903eb05598806f865193c2708
196 Risk Score

Malware Insights

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

The PDF document contains a lure related to a stroller sale, but the primary malicious activity is indicated by heuristics flagging it as a link farm and a remote-support tool lure. The presence of numerous external links, including one to 'ponafet.ru', suggests an attempt to redirect users to potentially malicious sites or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://ponafet.ru/strik?utm_term=bob+revolution+duallie+stroller+sale
    • https://cdn.sqhk.co/genepajev/EgiCxjh/ropake.pdf
    • https://cdn-cms.f-static.net/uploads/4444882/normal_60215464db496.pdf
    • https://cdn.sqhk.co/xoxapivasif/fRhfLgg/metal_slug_infinity_idle_game.pdf
    • https://cdn-cms.f-static.net/uploads/4412379/normal_60116e34f0b97.pdf
    • https://static.s123-cdn-static.com/uploads/4500447/normal_5ff7773825485.pdf
    • https://cdn-cms.f-static.net/uploads/4443357/normal_60210389c6dd7.pdf
    • https://cdn.sqhk.co/zeboxuze/CtABiig/90656532021.pdf
    • https://cdn-cms.f-static.net/uploads/4403421/normal_5fdbecb65a371.pdf
    • https://static.s123-cdn-static.com/uploads/4369640/normal_5fde4a166ee95.pdf
    • https://cdn.sqhk.co/fofateze/cQhbjfR/sports_board_games_printable.pdf
    • https://cdn.sqhk.co/jefutubup/RuhbQCN/bagejo.pdf
    • https://cdn.sqhk.co/javomekoru/icJg3na/monster_trucks_movie_stream_online.pdf
    • https://cdn-cms.f-static.net/uploads/4496391/normal_60323e9546cfb.pdf
    • https://cdn.sqhk.co/budajawisore/CzLUSjd/bissell_carpet_cleaner_black_friday_2019.pdf
    • https://cdn-cms.f-static.net/uploads/4407780/normal_6029c4ba2486f.pdf
    • https://cdn.sqhk.co/simikitivo/sjgghTx/93877914108.pdf
    • https://cdn.sqhk.co/pixafosabow/gdygi2B/hybrid_homeschool_programs_near_me.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rawesaragegugar/pokurutirateperatom.pdf
    • https://2a984544-7cb8-4a4d-9f60-e686f7994e39.filesusr.com/ugd/1434d3_e4fd55a77dcf4a55906cc4ceb8d21c47.pdf?index=true
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_db3c11f43a774ae391a3ec0c959b86a0.pdf?index=true
    • https://s3.amazonaws.com/vinivuxo/amazon_fire_stick_er_app_not_working.pdf
    • https://s3.amazonaws.com/vatosolikijike/android_auto_bmw_g20.pdf
    • https://s3.amazonaws.com/venunamazozuzo/cyberark_certification_exam_questions_and_answers.pdf
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_8312433805c945dead3e6493c0b2319f.pdf?index=true
    • https://665985ba-8e9f-4173-b993-17a3090d61d7.filesusr.com/ugd/08421c_c4d329642d4745769d2c70b93d14ea5a.pdf?index=true
    • https://s3.amazonaws.com/jobavo/asp.net_interview_questions_and_answers_for_4_years_experience_download.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_off0000ddf7.bin
4a29c6934636bfc36a3ad72f2372e5f5f14463c718b29cd9e325d95cd1c50b56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF7 5068 bytes
font_01_sfnt_off0000ef3c.bin
1ad2f86ecdf43082113785ab0be26137de0c5cbaccc662a2a6b53655b47bc41c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3C 10884 bytes

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