Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e36f5e9b0595bc…

MALICIOUS

PDF

78.5 KB Created: 2021-03-29 20:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b35b5fbce9ec4780259e7c239fbae9bc SHA-1: 8505d0556ec3aa766aadef6196f96ec0a4f1e58d SHA-256: e8e36f5e9b0595bc5d8d4653f00eec4ea17f7ef2a123efeb121425dcbf51916f
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous embedded URLs, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. The primary URL, https://maypoin.ru/award?keyword=bon+jovi+it+s+my+life+tab+pdf, is presented as a search result, likely to deceive users into clicking it.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/award?keyword=bon+jovi+it+s+my+life+tab+pdf PDF link annotation
    • https://cdn.sqhk.co/guwiwugomo/Jji8gir/patamakigeganalizugelode.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/calendar_september_october_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/cllUHKF/vegubitavevejurojama.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/ge8jiih/mavedimopedamasew.pdfIn PDF document text
    • https://cdn.sqhk.co/luginuwi/7nxijbs/35_ty_draw_road_cardiff.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/haH57RD/liserinew.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/hgJDThh/24544096046.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/jgmgjja/amc_the_walking_dead_season_9.pdfIn PDF document text
    • http://ozalupa.space/cuddledown_impressions_sheets58ohq.pdfIn PDF document text
    • http://maewallace.com/the_lying_game_sara_shepard_endinglwz6y.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/adJPyuE/pinball_wizard_game_apple_arcade.pdfIn PDF document text
    • https://cdn.sqhk.co/tibatojo/digDvij/41005158350.pdfIn PDF document text
    • http://obmenkalnr.online/floor_plan_template_microsoft_word_2013hx24n.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/ifOjfoV/lazomigojo.pdfIn PDF document text
    • https://cdn.sqhk.co/bobofibu/giic4o7/46620417112.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kenesowozowojaw.myartsonline.com/3825597586.pdfIn PDF document text
    • http://fatavetotujel.onlinewebshop.net/american_english_file_starter_book.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/dragon_age_origins_dlc_order.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/14166808755.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/quail_creek_state_park_fishing_report.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/character_sketch_of_johnny_in_the_ransom_of_red_chief.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_off0000f231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF231 5516 bytes
SHA-256: 983cf0eb6cf6f5198dd8971c86c69a47a4f7298772bece5c788e07311a73f0cb
font_01_sfnt_off000104f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F2 11376 bytes
SHA-256: 3ff3cc2f0011a5ad485460a0d86f28a0bd6a4579f5ffa241d2509b94d7ab2c7a

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