Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1a418ecc1a8343…

MALICIOUS

PDF

84.1 KB Created: 2021-02-27 06:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecd66e3022e73d93b69b140ab950bc05 SHA-1: bda93990ae00ec5a1112fb6d25cee3cb12b4c270 SHA-256: 0c1a418ecc1a83437c78a01869edab6f9b12bfe2cf42c4bd844bc12485cc9558
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, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the structure and URL patterns suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=ford+mustang+gt+price
    • http://jivusibofonefud.mygamesonline.org/80087351876.pdf
    • http://qlemelest.online/388507056965z80q.pdf
    • http://lnstagram-copyright-supports.com/the_road_cormac_mccarthy_movies850i.pdf
    • https://cdn.sqhk.co/kobewudojuvo/fAidgdQ/kageguxufodivuratilen.pdf
    • http://womotov.22web.org/dell_7010_motherboard_form_factor.pdf
    • http://vanojipiredatu.iblogger.org/timeline_powerpoint_template_slide.pdf
    • http://com-signto5.xyz/hattricks_drink_menugweli.pdf
    • https://cdn.sqhk.co/fakupavod/9idAhbA/7_wonders_of_the_world_list_old.pdf
    • http://dazipuv.iblogger.org/will_university_fees_be_reduced.pdf
    • http://subaxidubuju.22web.org/android_tv_best_web_browser.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://davofunup.onlinewebshop.net/how_to_clean_dyson_animal_vacuum_hose.pdf
    • http://jifazuniduvosi.epizy.com/deesa_to_mundra_port_distance.pdf
    • http://zonafikepejese.onlinewebshop.net/where_is_kathie_lee_gifford_today.pdf
    • http://terojujulemon.rf.gd/remington_700_bdl_boyds_stock.pdf
    • http://dixolasafu.epizy.com/dasarawusapeziluwedinu.pdf
    • http://tizerusop.rf.gd/8486493239.pdf
    • http://delezomixotu.epizy.com/dawn_of_titans_latest_apk.pdf
    • http://tuxizowivu.rf.gd/alan_walker_diamond_heart_mp4_free.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_off00010d3c.bin
4f7d0d26583381ec531c3023f1aaad32d71c430effb99ef662827892a67ae9ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3C 5316 bytes
font_01_sfnt_off00011f43.bin
eeac27bec908bd7c1192c773cc3c2dbc2cf40af4fb5c53fc529bd79fb08402ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F43 10692 bytes

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