Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29a2426f6b776b2…

MALICIOUS

PDF

165.4 KB Created: 2021-03-11 03:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: be44bf4db57c8c8a18807e59a3d44924 SHA-1: 9fec868c3ffc3d9fc9bb34c4474177910501a531 SHA-256: a29a2426f6b776b2afc4c2a46e4d86097a48d654b3ac53da533771c409d0d9c5
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://waforavorodi.weebly.com/uploads/1/3/4/3/134314120/9554428.pdf.
  • 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://jottigo.ru/award?keyword=free+official+scrabble+dictionary+pdf PDF link annotation
    • http://katalog-siberian-force.online/learn_pencil_sketching_step_by_stepdbzdk.pdfIn PDF document text
    • https://cdn.sqhk.co/sunawopi/PAjdhbi/85974615007.pdfIn PDF document text
    • https://waforavorodi.weebly.com/uploads/1/3/4/3/134314120/9554428.pdfIn PDF document text
    • http://matimomewojime.mypressonline.com/12085196499.pdfIn PDF document text
    • https://cdn.sqhk.co/lusesito/BNgc4SC/pubinujatariradedoni.pdfIn PDF document text
    • http://juponuziwotaga.mywebcommunity.org/maze_runner_series_order.pdfIn PDF document text
    • http://getporte.xyz/modern_atomic_and_nuclear_physics_problems_and_solutions_manual00jdw.pdfIn PDF document text
    • http://pushbiz.fun/2962452183fr9na.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/30_day_muscle_building_workout_plan_without_equipment.pdfIn PDF document text
    • http://tatuxuvoziparu.mywebcommunity.org/zojetumigixanevebovip.pdfIn PDF document text
    • https://cdn.sqhk.co/rabuvimi/jb2uXde/mud_bogging_games_for_xbox_360.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/50844520843.pdfIn PDF document text
    • https://madoguwulivusi.weebly.com/uploads/1/3/0/7/130775056/999ed3882758e8.pdfIn PDF document text
    • https://mogiwojijefinan.weebly.com/uploads/1/3/4/9/134900510/bexip.pdfIn PDF document text
    • http://copyrightshelpcenter.com/how_do_i_turn_the_alarm_off_on_my_g_shock_watchhtlvi.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/gjHghhh/descargar_actc_racing_pc.pdfIn PDF document text
    • http://alex-chekalev.com/phantom_of_the_opera_short_story_summaryqpdo4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eed9ed3f-d9bc-4f76-b1ea-11267275508e/what_would_demonstrate_the_differences_between_niche_and_habitat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/460055b2-334f-484f-bed8-123719d5f312/wixenaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9961d123-5949-4082-8506-b841c45e4132/how_to_train_your_mind_into_positive_thinking.pdfIn PDF document text
    • http://jatoxat.atwebpages.com/tilixarow.pdfIn PDF document text
    • http://misanedajog.myartsonline.com/fly_tying_desk_organization.pdfIn PDF document text
    • http://watusatuvor.myartsonline.com/community_needs_assessment_tools.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_off0002238e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2238E 10184 bytes
SHA-256: 7016ce0ad4f87fc4ffe0cb387007e3793d5bacd67027a61afa70eb08819d5fde
font_01_sfnt_off00024579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24579 5348 bytes
SHA-256: 2c32c1ce476711e21158ac88f8840e0d2c2da2331fb2d475373323d6c3288ba6
font_02_sfnt_off000257bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x257BD 14636 bytes
SHA-256: 0f770c482e739f46a0d5f9a0c803bddca6e822332860c3df7c9ba3c1c8a76ee6