Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e7bbb1807bca0c…

MALICIOUS

PDF

85.5 KB Created: 2021-04-29 20:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a31b87a493a306b6d41bbfcf908e7e16 SHA-1: 8c9ac3597513dbcdeaa0c523e3b4a73d691565d8 SHA-256: 76e7bbb1807bca0c90b8aa06f8cb8082639a71e1a6f14b99fd2f88fdb066ea67
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm or phishing operation. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further solidifies this assessment, pointing towards a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dafemum.ru/strik?utm_term=john+fraser+secondary+school+rate+my+teacher
    • http://italywow.pro/gotapikituwosoluboxc9n9g.pdf
    • http://bezorujod.iblogger.org/dijum.pdf
    • https://cdn.sqhk.co/ruxagoxoman/ONhe8IZ/big_east_women_s_basketball_tournament_bracket_2020.pdf
    • http://fuxisileza.mywebcommunity.org/gijatut.pdf
    • https://cdn.sqhk.co/begokaxawip/Bijbgi3/29487898359.pdf
    • http://snapchat-alert.com/xujugawakimapojixanui22k6.pdf
    • https://cdn.sqhk.co/jujifefa/7jfHghh/86930748434.pdf
    • http://doordash.fun/8960603691662xlk.pdf
    • http://zonitupupafof.sportsontheweb.net/takeragobetidoso.pdf
    • http://allerlo.xyz/exploratory_play_ideas_for_preschoolerss641d.pdf
    • http://effektzhizni.ru/sway_with_me_free_piano_sheet_musicuam7i.pdf
    • http://igme.site/2003_ford_focus_svt_head_gasket_replacement1c5lc.pdf
    • http://wegansit.space/huskee_riding_mower_tractor_supplycvgl1.pdf
    • http://zelegurelo.iblogger.org/54590079546.pdf
    • http://boguzimaro.getenjoyment.net/doreruro.pdf
    • https://cdn.sqhk.co/sodelaranu/hhfjjjM/galaxy_wars_2018_mod_apk_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/66aa62da-d5f5-4f92-95c1-679603d8edf0/xopikoxopan.pdf
    • http://vesedakowata.onlinewebshop.net/67620037878.pdf
    • https://uploads.strikinglycdn.com/files/1a4c5db4-df21-4d0e-ae23-6dc1b5caedf4/59782629180.pdf
    • https://uploads.strikinglycdn.com/files/8833c427-d9ef-402e-96aa-cf7d99370d21/lonely_planet_guide_western_australia.pdf
    • https://uploads.strikinglycdn.com/files/893e0ac2-7c20-4507-afda-d1c6877a65e2/62049841359.pdf
    • http://liraperuwuw.atwebpages.com/88858327861.pdf
    • https://uploads.strikinglycdn.com/files/b93f4e0f-ab82-4609-ae85-f2955710eb83/vezubelenerabato.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c28.bin
c5ef07109ad866f59c21cbc2c31ad902411df5b1d5b244dd8805c6de0489964e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C28 5352 bytes
font_01_sfnt_off00011e3d.bin
b7b5f6d8a47a24b4264be596397ce6114a416bf3b1650ec044d6d6926e37d7cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3D 13032 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.