Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb06ef0646be088a…

MALICIOUS

PDF

86.2 KB Created: 2021-03-05 19:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 52efcbebb2fec4de4c0840397748b96d SHA-1: 59b90f29b020b49c6339bfd349442e5ce4accff8 SHA-256: eb06ef0646be088a890006d68ad33f7b2c218fe52bae6e78323ed2fa226ce432
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, specifically as a phishing trojan. It contains an embedded URI pointing to 'bologen.ru', which is likely used to deliver a malicious payload or conduct phishing. The PDF structure and heuristics suggest it functions as a link farm designed to redirect users to this malicious domain.

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://bologen.ru/strik?utm_term=collected+works+of+ramana+maharshi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402481/normal_5fda3afddb116.pdfIn PDF document text
    • https://cdn.sqhk.co/dikozogub/hchaghe/words_with_friends_best_word_generator.pdfIn PDF document text
    • http://questotzvezd.space/how_do_penny_stocks_work_reddit106id.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/41197054898.pdfIn PDF document text
    • http://retys.space/difference_between_virus_and_bacteria_worksheet4eopf.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/gakilelesemames.pdfIn PDF document text
    • http://retys.space/pokemon_revolution_rock_climbi45f9.pdfIn PDF document text
    • http://info-pages.ru/are_dreams_real_lifemtd59.pdfIn PDF document text
    • http://spencermcman.us/how_long_does_uppababy_mesa_lastlh3u4.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/jgggjFA/high_taper_fade_black_male.pdfIn PDF document text
    • http://honey-love.ru/what_is_rpa_automationg20br.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377114/normal_5fe039c926c41.pdfIn PDF document text
    • http://sport-stavki.fun/cyberpunk_2077_ps4_updatere0a8.pdfIn PDF document text
    • http://lovemecompletely.com/736242371164j6jt.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/hEOB8ih/my_android_phone_won_t_turn_off.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://uploads.strikinglycdn.com/files/be9a0238-07d5-41ad-a202-2dfdd91d368c/shadowrun_sixth_world_core_rulebook_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd8b8793-2bee-47b2-9ec1-192b41d1d957/56996640825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e44767-cfdc-4ca3-9b34-554ba75ad1c3/craftsman_ys_4500_26_hp_kohler_parts.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/ge_profile_spacemaker_xl1800_charcoal_filter.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A7 5228 bytes
SHA-256: 1b32849aef9b83c549e959364287d54a63fe527c1d08be6525aaaf970f1b611f
font_01_sfnt_off00011a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4A 10392 bytes
SHA-256: 22b5db46d05bf2a0163492cc50490d1011b3f9595143638826a5c93e59e301dd
font_02_sfnt_off00013dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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