Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c15f428e0011099…

MALICIOUS

PDF

73.7 KB Created: 2021-03-23 13:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 977281ed0105ac91fc3873686dd16401 SHA-1: f9d8634776f22dd2806058eeff2be743f3ef4461 SHA-256: 4c15f428e0011099bf98f50a0fbae1d989233486125bc9065a2338c7add63a39
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with at least one, 'https://pelibifir.ru/wix?keyword=drawing+requirements+manual+%2528drm%2529+pdf', hosted on disposable infrastructure, suggesting a link farm or phishing lure. The PDF structure and embedded content are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pelibifir.ru/wix?keyword=drawing+requirements+manual+%2528drm%2529+pdf PDF link annotation
    • http://digitalmedialit.com/farsi_language_course49t54.pdfIn PDF document text
    • http://vkysnaya-eda.site/wizezukijes2lvds.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/ifEjcjd/star_wars_x_adidas.pdfIn PDF document text
    • http://mnclassis.org/challenger_12000_lift_installation_manualq71n8.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/jaOhegg/download_game_zombie_sniper_evil_hunter_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bidufewo/X4haThd/bhojpuri_movie_2019_hd_720p.pdfIn PDF document text
    • http://questotzvezd.space/14826720059rzpd.pdfIn PDF document text
    • https://cdn.sqhk.co/wodigajamu/jgigjhk/gisaxi.pdfIn PDF document text
    • http://dreamingdeveloper.com/80566979109do50g.pdfIn PDF document text
    • http://2gusevshop.space/xobux70kqf.pdfIn PDF document text
    • http://penageli.getenjoyment.net/causation_in_history.pdfIn PDF document text
    • https://cdn.sqhk.co/novujarogoga/ibB9tAB/deus_ex_goty_edition_review.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/L6iajhm/7915483194.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/7jbkMja/81661070759.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/sicM2gc/formula_1_2019_xbox_one_game.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/a9a43958-6acd-4024-b63f-1cc78bedb93c/99817332260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/782f024b-072d-4477-a129-676a2dcc98bc/52241380816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dba0c89-0d95-4dd6-b40f-b459e8d5ce9c/the_american_heritage_high_school_dictionary_fourth_edition.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/buzatow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d53bf9c3-69f1-4a18-8c45-699e8a73aa45/dell_optiplex_790_power_supply_diagnostic_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2159c1ab-6dc0-46ba-a96d-fe3584412405/microsoft_visual_c_step_by_step_8th_edition_download.pdfIn PDF document text
    • http://wowutuzineko.myartsonline.com/29382199778.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_off0000d372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD372 5504 bytes
SHA-256: b00eca5c27dc38b98c32d1cb776d141d5d247cec8925f96eab58ce1b3f67e33a
font_01_sfnt_off0000e621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE621 10700 bytes
SHA-256: a556b78e4d501e364d9f90629df1e990cff7178d2c8147217f40f655de86faa8
font_02_sfnt_off00010aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABA 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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