Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ce99d54f215956…

MALICIOUS

PDF

49.0 KB Created: 2021-03-28 17:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98193ba8b59dd2a64e865214480c558d SHA-1: 6a51289d498e720818ed5e737552c7377c9bf55f SHA-256: 48ce99d54f215956162d66961356a13d359af5fefdcd9fbd56cbf6c2cbe5a388
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a malicious phishing or malware delivery document. It employs an image-only lure, typical of phishing attempts, and contains numerous external links, including one pointing to a potential second-stage PDF payload. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the presence of external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7228

Heuristics 5

  • 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.
  • 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.
  • 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://xajibur.ru/award?keyword=steuerklasse+wechseln+nrw+pdf
    • http://bunnygummy.ru/libixiwajukinipewoxupedwyqnw.pdf
    • http://fruit-citrus.space/how_to_set_aquarium_heater_temperature6kg9u.pdf
    • http://theboldpantsproject.com/ikea_king_size_platform_bedst15wz.pdf
    • https://cdn.sqhk.co/xuxofidipo/1jijd8T/simegexemotafitiwuvupejuj.pdf
    • https://static.s123-cdn-static.com/uploads/4473902/normal_5fec5a7ac81df.pdf
    • http://getchambre.xyz/benirogejadapebadalezaomgxz.pdf
    • https://cdn.sqhk.co/fexiseme/be2wTgj/13263210215.pdf
    • https://cdn.sqhk.co/satasevubu/hiT6h3i/didamuwisomeb.pdf
    • http://ufenmac.com/the_never_ending_road_movie6rqno.pdf
    • http://itravelgr.com/theological_dictionary_of_the_new_testament_free_downloadp9gh7.pdf
    • http://rm-swis-mine.com/best_air_fryer_recipe_book_australiakuoba.pdf
    • https://static.s123-cdn-static.com/uploads/4482849/normal_5fde12ab5c47f.pdf
    • https://s3.amazonaws.com/sitok/poxokofozexajaxumiju.pdf
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_dc57966db875409ab0c4f43dcbd4db67.pdf?index=true
    • https://s3.amazonaws.com/meludav/wing_chun_kung_fu_near_me.pdf
    • https://s3.amazonaws.com/nakevoja/cloudy_with_achance_of_meatballs_cop_crying_gif.pdf
    • https://s3.amazonaws.com/feseni/muwasagadanikeva.pdf
    • https://3778afa4-e5d9-4bb6-be54-d343c89b577b.filesusr.com/ugd/11c894_74b8c36e7daa4098b6bfa9d30b59da64.pdf?index=true

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