Malicious PDF — malware analysis report

Static analysis result for SHA-256 04104c614817d0a9…

MALICIOUS

PDF

84.8 KB Created: 2021-03-14 17:00:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e08543042d81b448db0958b85b89aef2 SHA-1: 78d150e278c7b1122eba636f9147893d7d88c967 SHA-256: 04104c614817d0a95153b0ac07c6bc7b371cc96b07a013ca072f0cdb804f2b34
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though truncated, suggests a lure related to 'gluten free' taste, which is then redirected to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=why+does+gluten+free+taste+bad PDF link annotation
    • http://kagotigidiwijar.iblogger.org/zovoduguxozimif.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/SKiiThc/91181704432.pdfIn PDF document text
    • https://cdn.sqhk.co/mujetujojen/oQii15g/70224054909.pdfIn PDF document text
    • https://damanula.weebly.com/uploads/1/3/1/8/131856109/4b358fc4.pdfIn PDF document text
    • https://famuvotatag.weebly.com/uploads/1/3/0/8/130813835/6421447.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/ghRYajc/premam_telugu_bang_bang_song_lyrics.pdfIn PDF document text
    • http://zalofamanaw.22web.org/define_chairman_s_report.pdfIn PDF document text
    • https://rurepatokuzi.weebly.com/uploads/1/3/1/6/131636758/rexufapaza_golunodu_punudupugeb_jinev.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/eNjehaG/39430801752.pdfIn PDF document text
    • https://zagemixawidi.weebly.com/uploads/1/3/1/3/131378918/83ed8e.pdfIn PDF document text
    • http://vegemisabuxum.22web.org/verizon_android_bloatware_list.pdfIn PDF document text
    • https://gujibukogise.weebly.com/uploads/1/3/1/3/131380045/disuletawapab.pdfIn PDF document text
    • https://cdn.sqhk.co/xotabuti/6jbw3gf/warriors_game_score_play_by_play.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca33448-c8f0-47b0-b40c-aeb97db8506e/sistema_endocrino_organos_que_lo_componen_y_sus_funciones.pdfIn PDF document text
    • http://bolunivagoxel.epizy.com/sonotepadewo.pdfIn PDF document text
    • http://fasajixibapa.epizy.com/how_to_reset_marcy_exercise_bike.pdfIn PDF document text
    • http://zuxekesimulir.epizy.com/52283132954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1f2785-fa58-4eac-a793-6c0480a49fe0/satejok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe942d8a-40a6-4327-a7b9-86d5388ca396/is_mustang_ecoboost_fast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8dd413a-e58e-4162-bda9-e9cbc96015ac/29314814677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b571ff11-e6b3-427f-a14a-e8641766cf68/viwiguvubosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed0b76d5-6581-4707-99cc-21183a5e9871/sezipeduzoveve.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_off00010d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D10 5424 bytes
SHA-256: 9ef01fbb1af77ad5696aa776aad43405f53e0f77386a50350be0709aac6b27d3
font_01_sfnt_off00011f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F90 10840 bytes
SHA-256: 99081382fe0a414213364e66780aa74b84bec4cc37cbc313a391672699a16dab

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