Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0644e9614e9a8c…

MALICIOUS

PDF

78.5 KB Created: 2021-06-05 11:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: eedd22df475c1db635815144035cd72d SHA-1: f8dc5b0accefaffba4f04998a7383870694b187b SHA-256: 7e0644e9614e9a8ce8a6dcfb70111295e97e2df993019c06c2cd1c34d17a5f66
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded links, with one prominent URL suggesting a download for a game, likely a lure for users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://synerhu.ru/pbw?utm_term=download+gta+san+andreas+%2528data+%252B+obb%2529+apk+highly PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kolelulu.pbworks.com/w/file/fetch/144561864/um_pacto_com_meus_olhos_bob_sorge.pdfIn PDF document text
    • http://finebov.pbworks.com/w/file/fetch/144648102/kefuwizoriroxuwubaxemo.pdfIn PDF document text
    • http://niluputevi.pbworks.com/w/file/fetch/144447480/pezeserepexetusixefefej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd60aced-7e78-4908-8c1e-c3b603821275/jumpsuit_lyrics_espaol.pdfIn PDF document text
    • http://jebusolole.pbworks.com/w/file/fetch/144643104/whats_the_definition_of_present_tense.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/f/casio_protrek_5113_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/562a96a3-f652-4750-86eb-3db22cafac83/51375133621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bc25418-be73-4acb-a4ba-5011c546d63d/chess_endgame_puzzles_book.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/w/file/fetch/144572820/fuwoluvilolomudiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cd5db8f-392b-4eb2-8360-8d2535238a7b/scion_xb_2006_oil_filter_type.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d5b182-a227-4bb5-9202-65799eafbf8e/63755410849.pdfIn PDF document text
    • http://zabodovojif.pbworks.com/f/the_interview_1998_explained_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15bbe286-9479-411b-9e28-c3b25201c6c0/tiwegizorusaduzuboza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0b6b6d-28c1-45cd-a8e8-e5b2e584281f/historia_natural_de_la_enfermedad_del_dengue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9547ffad-521b-4464-aa98-b43d875cbfad/nadajijo.pdfIn PDF document text
    • http://molosafokaji.pbworks.com/f/vonufesigesomugejaji.pdfIn PDF document text
    • http://xugilip.pbworks.com/f/wajebiwewezevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/571c416c-50fa-49d9-a631-0608604ef961/o_limo_quebra_o_jejum_intermitente.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23907133-1fbe-4dc1-a8ad-67a19ef7015c/adding_mixed_fractions_calculator_soup.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/52505937240.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/w/file/fetch/144570354/how_do_i_cleanse_my_liver_at_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aabf564d-a8ec-42c8-bf22-fc970248970b/manitujonole.pdfIn PDF document text
    • http://sonubugu.pbworks.com/f/turkey_scholarship_interview_questions.pdfIn PDF document text
    • http://luwivaj.pbworks.com/f/how_to_fill_out_receipt_book_for_daycare.pdfIn PDF document text
    • http://bovojigu.pbworks.com/w/file/fetch/144424611/15159236357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df383f5-bbe6-4636-9150-7dbb1819646f/are_samsung_washing_machines_any_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17e7949-0c26-435b-9f40-f44bc3142f3b/24312167282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c1c8aed-6e22-45c7-96c3-a7b8b6913c2d/cheat_codes_the_sims_freeplay_ipad.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_off0000f053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF053 5772 bytes
SHA-256: 8ea36da3b9ea6a8105756d843a0b9f8ef11111dc4373864bd2837aa1686d9c3a
font_01_sfnt_off00010418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10418 12024 bytes
SHA-256: 4d79c1ed902de7163d44b29755758cf2f9325933ed0b40fd835ffb6a22344b8a

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