Malicious PDF — malware analysis report

Static analysis result for SHA-256 30256c8994457099…

MALICIOUS

PDF

77.2 KB Created: 2021-03-11 11:34:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a05aa80044ab76d5f1c7fc232ddbd388 SHA-1: 3047d76118d6d373184f6fb0b318338c2a88ad05 SHA-256: 30256c8994457099a099216a1fef8208a5d1fde8e83771deb2b94172b8d2993a
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a search query, reinforcing the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/strik?utm_term=autocad+3d+rotate+z+axis PDF link annotation
    • http://lojisaka.22web.org/32241464775.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/jiNHrwa/callaloo_lancaster_owners.pdfIn PDF document text
    • https://cdn.sqhk.co/somufegojaru/hgjbiij/ribatolazu.pdfIn PDF document text
    • https://cdn.sqhk.co/dasadogiso/F9t1Ehh/boku_no_hero_academia_personality_quiz.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/FgejjKo/italian_opera_love_songs_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/rurizibaxami/T9ifqai/army_frontline_shooting_strike_mission_force_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/fudimesa/ijBd0ha/nba_basketball_video_games_online.pdfIn PDF document text
    • http://loxapul.iblogger.org/sotolosarolono.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/hiedhgX/air_war_helicopter_shooting.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/how_to_write_a_reflective_essay_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/4jhMI1Z/babebarum.pdfIn PDF document text
    • https://cdn.sqhk.co/manoxixo/dXXJhif/plinko_master_app_cheats.pdfIn PDF document text
    • http://bajoreto.sportsontheweb.net/bienestar_psicologico_laboral.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
    • http://komiguzuvare.rf.gd/fozag.pdfIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_7a767993c594450ea23bb0eb15171dca.pdf?index=trueIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_55b8b815598444b99d46ffaad2a0b1c9.pdf?index=trueIn PDF document text
    • http://zifezerolivuba.epizy.com/how_to_reset_whirlpool_duet_sport_dryer.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22D 4032 bytes
SHA-256: 1d890cbc49c86b194b6bea92bfd272c23f59aa3734dae7befebffe896f6f634c
font_01_sfnt_off0000e09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09D 4948 bytes
SHA-256: a254dd8e0ba10e3ae01aa7602975d9de3a03ef2a321bc699553102795376e2fb
font_02_sfnt_off0000f189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF189 11436 bytes
SHA-256: 1420e944c3881deeb209a51a8c7e91344588213804f867af107d484ec3f0d1c6
font_03_sfnt_off00011764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11764 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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