Malicious PDF — malware analysis report

Static analysis result for SHA-256 987e3f87029f0482…

MALICIOUS

PDF

77.7 KB Created: 2021-01-30 06:53:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e97c7534816bb37941d49270181597d3 SHA-1: c86ec2dafae82c94ec373f21645be80cfbcad5d8 SHA-256: 987e3f87029f04828785bc807f9501267c34af1c331675ba76816604d0c49220
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded links pointing to disposable domains, suggesting a link farm or phishing campaign. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user interactions, further supporting a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=quotes+about+stereotypes PDF link annotation
    • http://rostov-mobile-doctor.ru/lucky_block_mod_minecraft_pe_free_download7u330.pdfIn PDF document text
    • http://lyudi23.ru/nutaku_unlimited_coins_mod_apkp0s8r.pdfIn PDF document text
    • http://bifugejif.22web.org/pc_bus_games_for_windows_7.pdfIn PDF document text
    • http://gerisekazaleg.22web.org/battleship_the_video_game_pc_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387706/normal_6006407c746a0.pdfIn PDF document text
    • http://idealica-ordina.site/revelation_online_occultist_stats_buildshnmx.pdfIn PDF document text
    • http://mpvideo.org/advertising_industry_in_malaysiadxefz.pdfIn PDF document text
    • http://reduslim-italy.site/aire_acondicionado_portatil_carrefou1p1v0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450244/normal_60044a6c9b5fc.pdfIn PDF document text
    • http://pressit.space/spectacled_bear_habitat_mapffexp.pdfIn PDF document text
    • http://myfoxing.online/selati7s22.pdfIn PDF document text
    • http://geguxejap.22web.org/35875433355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491969/normal_6014a2db99738.pdfIn PDF document text
    • http://onenature.space/diners_club_black_reward_redemptions34e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/new_chhattisgarhi_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/conversion_graphs_worksheet_ks2.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/guide_to_adirondack_trails_high_peaks_region.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/liquidez_corriente.pdfIn PDF document text
    • http://wawutanow.epizy.com/direito_penal_cezar_roberto_bitencourt.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72F 4812 bytes
SHA-256: 004b7e0abac0564dd2bf6081d665ecd65810223e8366ff79724f21670d79d49e
font_01_sfnt_off0000f79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 10568 bytes
SHA-256: f48f8778cbace3653631f44bfbde951e7c8eaa4c0592f899d80d6a86e5e01683
font_02_sfnt_off00011b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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