Malicious PDF — malware analysis report

Static analysis result for SHA-256 f142a7a7d2c1bd0e…

MALICIOUS

PDF

74.7 KB Created: 2021-04-15 12:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bb339fb668c19153227fe3956e72e5d SHA-1: 51c1016c7a356f59ac96091c3ef978d42d28d224 SHA-256: f142a7a7d2c1bd0e90287ec04c917468b9e38a2755dc5be3b6331a8a91e76205
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM'. The primary URL points to a site that appears to be related to car maintenance, but the overall structure suggests a link farm designed to manipulate search engine results or redirect users to potentially malicious sites. No scripts were extracted, but the presence of numerous external links indicates a likely attempt to lead the user away from the document to a compromised or malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://seumenha.ru/strik?utm_term=how+to+reset+oil+light+2013+prius+c
    • https://cdn.sqhk.co/leguzufaju/bVlhfhg/real_car_parking_simulator_car_driving_academy_games.pdf
    • https://cdn.sqhk.co/nuvaratuji/fjijeth/57674618902.pdf
    • https://cdn.sqhk.co/mamidusidozu/iiiQoif/strategy_board_games_online.pdf
    • https://cdn.sqhk.co/fefuxumito/bpjhdOy/kodiak_bear_weight_record.pdf
    • https://cdn.sqhk.co/nadipozow/epP4yeI/zombie_sniper_mod_apk.pdf
    • http://mazikopipovix.mywebcommunity.org/papiguzozefexurukelixoxes.pdf
    • http://pewujok.mypressonline.com/sc_caste_certificate_form.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_eb5d832d8c604d9199e9db688b7cab73.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7da1e6e9-73d3-448d-8d23-78264f77c767/dd_class_personality_quiz.pdf
    • https://s3.amazonaws.com/suxugipipolazog/angularjs_1_interview_questions_and_answers_for_experienced.pdf
    • https://s3.amazonaws.com/farefasejikap/certified_fraud_examiner_salary_in_south_africa.pdf
    • https://s3.amazonaws.com/purawuma/tamil_tv_awards_show_free.pdf
    • https://s3.amazonaws.com/vedexajawo/wifasupat.pdf
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_5553e4b9cdf146b7917a791caf6c4e69.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c6122d3f-4e70-4701-995a-7a94619c32b7/30327044284.pdf
    • https://s3.amazonaws.com/meludav/vejokavimojaxer.pdf
    • https://s3.amazonaws.com/rewepalazamiso/how_do_i_find_my_technicolor_router_password.pdf
    • https://s3.amazonaws.com/votuweroxigezog/vopomilosuwunopinawo.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_off0000e3db.bin
4e0c447f669701952cf05979d6d1718f41c1db05162e5b3cdc4b6790059a1358		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DB 5528 bytes
font_01_sfnt_off0000f6bf.bin
5e2a3d4d03591d73eaba0a00c50423414adef65dfb27a7f1298b96f1b9c89b41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BF 11476 bytes

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