Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6c971127c69ac1…

MALICIOUS

PDF

83.5 KB Created: 2021-05-01 16:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 6f65e36094d38ef2331181cc1b147d26 SHA-1: 56606fa55196d7706cb2d4551dfc542b636a68d3 SHA-256: ec6c971127c69ac19391201b4110e54ef790f3c053a39c083b2ef41f6af415ff
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/strik?utm_term=should+i+read+the+game+of+thrones+books+before+watching PDF link annotation
    • http://support-copyrighthelpservice-about.com/how_to_install_liftmaster_logic_boardsjoil.pdfIn PDF document text
    • http://talemine.getenjoyment.net/financial_analysis_types.pdfIn PDF document text
    • http://russianstravel.ru/xebepakofaxovulupugyfs2d.pdfIn PDF document text
    • http://bonus332.site/mupuzifuso19toh.pdfIn PDF document text
    • http://ufenmac.com/metal_gear_rising_revengeance_apkdok8s.pdfIn PDF document text
    • http://giftcard-sale.store/10896886742angfm.pdfIn PDF document text
    • http://1xbet-football.fun/free_stories_audio_stories_and_books_pratilipi_apkdxt0d.pdfIn PDF document text
    • http://vienvozvrat.site/did_pixar_make_frozen_2u4npb.pdfIn PDF document text
    • http://lozhobelir.space/wheres_wally_outfit_amazont6rcs.pdfIn PDF document text
    • http://cheatyou.site/ddo_monster_savesixt13.pdfIn PDF document text
    • http://besefobusim.mypressonline.com/abnormal_child_and_adolescent_psychology_with_dsm_v_updates.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/274c009a-576c-4f5b-95d8-cb85927d932c/what_were_the_occupations_of_the_12_disciples_of_jesus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a2d2776-e542-4fbc-8af9-37a925525634/3626569918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f677250-87b9-47cc-9a94-7ac882cf44f2/zugadokupoxorabito.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/nsc_defensive_driving_course_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/endless_love_full_movie_hd_popcorn.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/wurajoludabajonuze.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/3663224615.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/practical_atlas_of_tung_s_acupuncture_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/maplestory_come_find_me_cheat_sheet.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/where_to_learn_photography_in_lagos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23989c06-db9d-4e0c-910d-05898b40f2f9/bakulokusoziva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdedbbd4-8dde-4cd7-b63d-14be2c793eda/how_to_calculate_the_slope_with_two_points.pdfIn PDF document text
    • http://nudagimanefej.atwebpages.com/causes_of_lung_cancer.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_off0000f5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F3 5716 bytes
SHA-256: 05e7ccbf60adb2e88460c2a580acaef55e4d1222445a3ba9b1c0622976f000aa
font_01_sfnt_off0001094c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 11388 bytes
SHA-256: 7d11024053a22fc0745541c8f4304c7b79c67ece211256fc6512c185a7c5612b
font_02_sfnt_off00012fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34