Malicious PDF — malware analysis report

Static analysis result for SHA-256 a974111ad228f0f4…

MALICIOUS

PDF

86.7 KB Created: 2021-03-03 04:12:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3b56dfec0e2bc8cfec7466e5d63dced7 SHA-1: e1291d0479e9e41e7308378dc6601e373b0e9d79 SHA-256: a974111ad228f0f496772d1d005aa840d4dbe76275463d4ef7fa5450557c1cc3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to distribute malware or facilitate phishing attacks. The presence of external URIs and the 'link farm' heuristic strongly indicate an attempt to redirect users to malicious sites.

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://bologen.ru/strik?utm_term=st+croix+element+pellet+stove+reviews PDF link annotation
    • http://mananeje.66ghz.com/malayalam_love_whatsapp_status_mp4.pdfIn PDF document text
    • http://espaceclient-cmb.com/39578503402hhc9o.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/what_is_the_rarest_nascar_diecast.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/gdPxyZd/fugudibegusatelo.pdfIn PDF document text
    • https://cdn.sqhk.co/zefadanexa/jhbt4hi/quran_in_english_transliteration.pdfIn PDF document text
    • http://legionmone.xyz/parrot_ck3100_sound_problems9glws.pdfIn PDF document text
    • https://cdn.sqhk.co/rukugewul/ihggfgu/road_trip_beer_pong_castellano.pdfIn PDF document text
    • https://cdn.sqhk.co/zixagiko/dYghdu4/survivor_redemption_island_cast_photos.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/f2R0jfg/change_my_voicemail_recording.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/paxomepogemuxugojo.pdfIn PDF document text
    • https://cdn.sqhk.co/ronuwimo/dO67ie4/openttd_wiki_local_authority.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bologipegokofi.epizy.com/advanced_language_practice_michael_vince_vk.pdfIn PDF document text
    • http://wemikovovafebo.epizy.com/tezurelubusexe.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/2004_ford_focus_alternator_autozone.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_off000115af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AF 5192 bytes
SHA-256: cc9fde4283374cfe67ed88d5c00341b7d860f7c0dd1b26ed136a66e4d7dcefb7
font_01_sfnt_off0001275b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275B 11200 bytes
SHA-256: 0dd2cd59c649824a958b073d509da82524a1011708cf1b7984ad79bcc720db4e

Open this report in the interactive analyzer, or submit your own file for analysis.