Malicious PDF — malware analysis report

Static analysis result for SHA-256 0710502b25160fa9…

MALICIOUS

PDF

106.6 KB Created: 2021-03-18 00:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5416741748f07b7519a2d734f982a8fe SHA-1: bd83ecc15c084b80f040a0a842d2901ab44b4fd5 SHA-256: 0710502b25160fa96d03d596e5c2a71130eae03e0111b42613fbdd32153ef078
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates this behavior, and the presence of external URIs further supports this. While no scripts were extracted, the document's structure and embedded links are indicative of a phishing or malware distribution attempt.

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
  • 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.
  • 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=sounds+true+radical+forgiveness+worksheet PDF link annotation
    • https://cdn.sqhk.co/visukodo/QijoBPl/ripinunerikaxufovana.pdfIn PDF document text
    • http://pepariravifaza.getenjoyment.net/budgeting_books.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/hjvUElY/chromecast_built_in_app_for_android_tv.pdfIn PDF document text
    • http://i-men.ru/what_is_call_spread_and_put_spreadvi8n0.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/kagibi.pdfIn PDF document text
    • http://bigmagazin.xyz/48351385772ah2z1.pdfIn PDF document text
    • https://cdn.sqhk.co/fokapalo/jdOdij3/62604134110.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/jjcBGji/my_virtual_pet_shop_apk_mod.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/free_ged_social_studies_practice_test_2019.pdfIn PDF document text
    • http://shlifovka-pol.website/stephen_kings_it_drama_miniseries_casttpdb9.pdfIn PDF document text
    • https://cdn.sqhk.co/xumifutave/eahhqT4/carrom_board_classic_game_rules.pdfIn PDF document text
    • http://insta-sale.site/2_player_card_gamesef8vi.pdfIn PDF document text
    • http://getcreditreport.info/81955505125ejuz6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_ac50c914017b4d77a9c8ec63ffc7429c.pdf?index=trueIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_d38e3aeb919c45e5a902fb6c2bc1d57b.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_11498cb545be45649604389ed3b59674.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/convenios_internacionales_concepto.pdfIn PDF document text
    • https://d2497fa9-5496-4194-9764-f4b168485e88.filesusr.com/ugd/eed259_c7b90de8e79b433c8792911f83c48b45.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vukusa/27209586149.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/dijezagunon.pdfIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_a80cce3a205f448da9a07e1804bebc7a.pdf?index=trueIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_e7f564fa811f40a69b5d6b0c9d5beeb5.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_off0001638c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1638C 5604 bytes
SHA-256: 2460295d2a21643f936724c5e0322084350c7d51d7eb9a17faeb7df66bb2f9eb
font_01_sfnt_off000176a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176A7 10736 bytes
SHA-256: 0199a07e2fc6657d543325f42aa34899df74af15333cad79850faa4302b7eb10

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