Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c2aec502b8d6ec…

MALICIOUS

PDF

76.3 KB Created: 2021-03-27 17:02:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 294264ec8b05405871d28817d4e75fcf SHA-1: e55ea6a7036e70287a60817fd42c6c6db07fc927 SHA-256: f3c2aec502b8d6ec33217a1bd5c7669c24a3b48c615dddaa6bfcc6b7d8877be9
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting it functions as a link farm or phishing lure. The PDF structure and embedded content, despite being heavily obfuscated, are indicative of a malicious document designed to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wix?keyword=resurrection+appearances+in+chronological+order PDF link annotation
    • https://cdn.sqhk.co/tamaladafa/1ii3jgS/dragon_ball_super_hd_wallpaper_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/hjBgd4s/vaxuwupizuditijetazevuz.pdfIn PDF document text
    • https://cdn.sqhk.co/bagudivibi/lFhfhir/80s_dance_music_hits.pdfIn PDF document text
    • http://jiwimejikigigu.mywebcommunity.org/eenadu_epaper_sunday_book.pdfIn PDF document text
    • https://cdn.sqhk.co/xovenekot/iXr4VtS/nokimefenekonaxixaxiso.pdfIn PDF document text
    • http://hookup666.site/88703439728iez71.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/jcMS3RU/only_one_you_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/gM9jejh/pokemon_go_promo_codes.pdfIn PDF document text
    • http://kewatupu.scienceontheweb.net/asbestosis_diagnostico.pdfIn PDF document text
    • http://profit-makers.club/wizotqg64a.pdfIn PDF document text
    • http://kazotapojiwi.mywebcommunity.org/causas_de_contaminacion_ambiental.pdfIn PDF document text
    • http://bionatur.space/39763460484kv5n3.pdfIn PDF document text
    • http://mujododaziwato.scienceontheweb.net/wojopefuzifalupadubenotib.pdfIn PDF document text
    • https://cdn.sqhk.co/tedubifo/Jjiiigh/zurikovojanobelun.pdfIn PDF document text
    • https://cdn.sqhk.co/sesudegaruta/ejjkgd1/jurnal_hernia_diafragmatika.pdfIn PDF document text
    • http://voiprormul.xyz/kemuxavekugebebizuvipok6bp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/etq_tg3000_generator_parts.pdfIn PDF document text
    • http://wereguvepowu.epizy.com/high_performance_liquid_chromatography_stationary_phase.pdfIn PDF document text
    • http://xolazituvote.epizy.com/tibia_paladin_weapon_guide.pdfIn PDF document text
    • http://xefujifivifizu.epizy.com/admiral_capacity_plus_washer_wont_turn_on.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/motabesusezotewi.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_off0000ec08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC08 5340 bytes
SHA-256: 5bfe337ded1d6c4fb8c9cdce5d06e4c4c51bac14ba3096ceaf16702308a89998
font_01_sfnt_off0000fe2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2E 10332 bytes
SHA-256: f2dafa02c2d8aa6ddbc32afce7e84374d03d1ac09768e8f76994cc55a49f95cc

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