Malicious PDF — malware analysis report

Static analysis result for SHA-256 282711d40383db93…

MALICIOUS

PDF

90.1 KB Created: 2021-03-18 01:35:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd0dee6fbf924ee270c4db9c1331a657 SHA-1: 7fb7ca3a7c3fb6db22bc6ada21786bdf67a15aa9 SHA-256: 282711d40383db934b8893851cf615020e4aa2a3b0b61f528b3abc5696b6bb35
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or phishing attempt. The embedded URLs and the PDF structure indicate an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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
  • 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://bologen.ru/award?keyword=arrian+anabasis+of+alexander+pdf
    • https://cdn.sqhk.co/nupozifulija/gigHFgh/manojexorasobunenuvugefen.pdf
    • https://fusofopafufet.weebly.com/uploads/1/3/5/2/135294951/2518696.pdf
    • https://cdn.sqhk.co/xadelakora/hbQHO4W/color_notes_for_windows.pdf
    • https://cdn.sqhk.co/vejuwozigef/Mmliejj/30565514212.pdf
    • https://cdn.sqhk.co/putuziboki/Kqjdihu/snake_vs_block_all_skins_unlocked.pdf
    • https://kenaveduku.weebly.com/uploads/1/3/0/8/130813649/bosuxotitare_foluzuviw.pdf
    • https://cdn.sqhk.co/fikubife/cijjgek/idle_egg_tycoon_mod_apk_unlimited_money.pdf
    • https://cdn.sqhk.co/wasefago/wBgcBGD/34827077035.pdf
    • https://cdn.sqhk.co/wemorapi/M4pIgjZ/moto_rider_go_highway_traffic_hack_game_download.pdf
    • https://cdn.sqhk.co/suxujaba/gC0WZxr/feist_1234_album.pdf
    • https://cdn.sqhk.co/jupujezaxa/Yiaid7O/cbse_class_9_registration_2020-_21_age_limit.pdf
    • https://cdn.sqhk.co/togixulala/Wr5gdT2/extended_essay_guidelines_ib.pdf
    • https://cdn.sqhk.co/jotenitix/Hha6Xhg/xolaturumatalivamo.pdf
    • https://cdn.sqhk.co/bivosozos/1Mhjijz/astronest_the_beginning_heroes.pdf
    • https://cdn.sqhk.co/bevizewo/fBo7jaB/16083159357.pdf
    • https://cdn.sqhk.co/zetoreli/Iig3I9Q/cross_edge_formula_red_rollerball_pen.pdf
    • https://cdn.sqhk.co/gorisaburo/BheOghW/24674413451.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/daraniwekamidir/valores_y_antivalores_humanos.pdf
    • https://uploads.strikinglycdn.com/files/4055e8f7-2da8-4bb2-a081-fdc6d575382c/is_fedex_printing_open.pdf
    • https://uploads.strikinglycdn.com/files/ffe235d7-20bd-47b9-8a3b-335c263ad85b/tezofapegowaboxuzuvelozu.pdf
    • https://uploads.strikinglycdn.com/files/94f79565-287a-4e38-afb2-4078b04fd076/death_note_movie_ending_explained.pdf
    • https://s3.amazonaws.com/bitajemisajoz/barish_ka_mosam_song.pdf
    • https://s3.amazonaws.com/jinotugiwomo/fibizenu.pdf
    • https://uploads.strikinglycdn.com/files/26f67760-8129-4070-a3bb-f6b64df15138/math_worksheets_grade_3.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_off00012669.bin
078f2f716d583e0ef747c63144769248155ce7fc27f6d8bc0f680b1062bbaf4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12669 5232 bytes
font_01_sfnt_off00013842.bin
9a763ec64755d66af94118cadec869dca786bb977fb9c59b4d8b9421e712f999		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13842 10084 bytes

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