Malicious PDF — malware analysis report

Static analysis result for SHA-256 81ecce5b779aec8f…

MALICIOUS

PDF

48.0 KB Created: 2021-02-25 04:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88044ac84d4cf832538c7782656f7d6b SHA-1: 8b35dc8201575e9af43b4fb5870bff37e4083d2f SHA-256: 81ecce5b779aec8fb8e7ba3506b7aa70b71d2a3fce2fb748be06bb0d9c1f893a
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and embedded clickable links. The heuristic 'PDF_IMAGE_LURE' indicates it's designed to trick users into clicking an action trigger. The presence of multiple external URIs, including one pointing to 'bologen.ru', suggests a campaign aiming to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7042

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 48 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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=hp+lj+p1606dn+toner
    • http://nokasosozigof.mypressonline.com/80823988966.pdf
    • http://accueilcmb.com/xiwizirivutoxevuuwian.pdf
    • https://cdn.sqhk.co/jivomawufem/0JvHAII/81726991849.pdf
    • https://gaditefu.weebly.com/uploads/1/3/2/7/132712385/348991.pdf
    • http://copyrightnotices-form.com/wifi_signal_booster_pro_apk_fulllgpfd.pdf
    • https://pogosarixuxa.weebly.com/uploads/1/3/0/7/130776079/6289958.pdf
    • http://klossheff.xyz/zedenew2out6.pdf
    • https://cdn-cms.f-static.net/uploads/4503050/normal_5fd1008de39ad.pdf
    • https://cdn.sqhk.co/duditizonut/doAhage/zanibepowepakanipakifofa.pdf
    • https://juzopuxenepin.weebly.com/uploads/1/3/5/3/135383483/lavemib.pdf
    • http://stixlife.info/good_morning_gif_hd_photos0za7d.pdf
    • https://cdn.sqhk.co/fenazijeguk/iRXdBgh/free_r_b_hip_hop_radio_stations_nashville.pdf
    • http://help-verifiedbadgecenter.com/mavumywcsr.pdf
    • https://cdn-cms.f-static.net/uploads/4379029/normal_6034851e1a433.pdf
    • https://mobisikude.weebly.com/uploads/1/3/1/6/131606420/baxuzeve.pdf
    • https://s3.amazonaws.com/metubevozisul/9770574153.pdf
    • https://s3.amazonaws.com/gotitibekovi/57868432049.pdf
    • https://s3.amazonaws.com/mogipegi/cpm_ebooks_answers_integrated_1.pdf

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