Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0d84ebcef332b7…

MALICIOUS

PDF

74.8 KB Created: 2021-05-06 23:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d9b265d1b36ee9af596a64e5216bf404 SHA-1: 2c882f56fae31ec05a4cbcc4c17409512a8af87d SHA-256: 8c0d84ebcef332b71dc17aead8798a9a958d1c9b77e173f22f19310626a6fea8
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document as a link farm on disposable hosting, reinforcing the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=sensus+srii+water+meter+problems PDF link annotation
    • http://imedo.ru/why_is_my_laptop_charging_light_blinkingug98e.pdfIn PDF document text
    • https://cdn.sqhk.co/felibepudu/UZhcgjb/grandfather_clock_flute_sheet_music.pdfIn PDF document text
    • http://udilische.club/chingamasam_vannu_chernnal_dj_songiv15w.pdfIn PDF document text
    • http://venubur.22web.org/what_was_the_second_great_awakening_a_reaction_to.pdfIn PDF document text
    • http://selizixid.iblogger.org/83348963333.pdfIn PDF document text
    • http://webdefilmizle.com/assertiveness_books6wlrv.pdfIn PDF document text
    • http://tameenegypt.com/raid_bosses_destiny_2mrm9c.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/iwghGqv/82361979799.pdfIn PDF document text
    • http://pinudub.iblogger.org/garmin_dash_cam_56_specs.pdfIn PDF document text
    • http://martakkord.ru/yamaha_moxf6_review_sound_on_soundkp7hk.pdfIn PDF document text
    • https://cdn.sqhk.co/waxusuxagaki/uSjjmjb/block_craft_3d_download_free_pc.pdfIn PDF document text
    • http://flylovel.com/no_crop_for_instagram_dpk7vw0.pdfIn PDF document text
    • https://cdn.sqhk.co/mogilirexexa/DBiivjd/all_fortnite_girl_skins_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/wadebekop/ih2jh2a/fps_man_scary_ghost_labyrinth.pdfIn PDF document text
    • http://masajsalonunuz.com/516604662493sq4j.pdfIn PDF document text
    • http://otshelnik.net/52653613115sa0b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wawotor.epizy.com/timberline_wood_stove_baffle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e90c715-9d92-4102-b578-a55e7a897de5/janagom.pdfIn PDF document text
    • http://xovizedi.rf.gd/taviw.pdfIn PDF document text
    • http://merizipu.rf.gd/boxosifoposetuxuropoxil.pdfIn PDF document text
    • http://lomiwolidosin.rf.gd/prisms_and_pyramids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a6a644f-8ef5-4ce4-9124-ef19f4da6625/79635968639.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73B 5300 bytes
SHA-256: 621758195a6448a1bda9e46a3b0df094979ce290f31a85a7ff8b286e5cefd766
font_01_sfnt_off0000f934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF934 10736 bytes
SHA-256: ec6dc64ca7e0722fa91330eb13cc2dd20766c182896ba8494a5e2db1060204af

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