Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c46552815a567c3…

MALICIOUS

PDF

70.9 KB Created: 2021-03-25 06:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07a4e13696c5a8ac0f438ecc5e593e5d SHA-1: 9fa9d91c5615e8b2e9f741866896156bc0c59be3 SHA-256: 5c46552815a567c31ff0c9239e1ccc8a5d15232c4441f8a1d764bf50ecebfc66
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to hide a clickable link. The presence of numerous external PDF links, including one to zajinet.ru, suggests an attempt to redirect users to malicious content or phishing pages. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8042

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 70 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://zajinet.ru/award?keyword=materiales+dentales+craig+pdf
    • http://kizunawinim.getenjoyment.net/attack_on_titan_season_1_theme_song_ringtone.pdf
    • https://gupobotinifetex.weebly.com/uploads/1/3/4/3/134338345/ed437f59e57.pdf
    • http://rijewomel.scienceontheweb.net/31066846779.pdf
    • http://suxoxaxowigab.scienceontheweb.net/94715406478.pdf
    • http://sopesukenapad.scienceontheweb.net/jotezuzubonojulilukimad.pdf
    • http://mojenisijita.mywebcommunity.org/math_formula_in_hindi_free_download.pdf
    • https://xoxazibazosilex.weebly.com/uploads/1/3/4/5/134590820/kibaj.pdf
    • http://penexej.mywebcommunity.org/actividades_aumentativos_y_diminutivos.pdf
    • http://gibelineg.sportsontheweb.net/29913716394.pdf
    • http://lunatan.medianewsonline.com/journey_to_the_center_of_the_earth_book_reading_level.pdf
    • http://rivenoke.onlinewebshop.net/23015996771.pdf
    • https://s3.amazonaws.com/badodemebo/nobegosuloviteburi.pdf
    • https://s3.amazonaws.com/kotidox/93204629514.pdf
    • https://s3.amazonaws.com/somamere/anastasia_romanov_deformity.pdf
    • https://s3.amazonaws.com/ropidadegaxut/skysports_tv_guide_nz.pdf
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_b441030f901c4a869742d1f9aea9a02d.pdf?index=true
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_d12d18744b6d4b3f992309aeecf9275f.pdf?index=true
    • https://s3.amazonaws.com/nijudow/puvinufapuginom.pdf
    • https://s3.amazonaws.com/robumuduluwise/56521847503.pdf
    • https://s3.amazonaws.com/kibavutibeved/research_methods_for_the_behavioral_sciences_gregory_j._privitera.pdf
    • https://s3.amazonaws.com/vukumesoj/kadejeselajubarelaboto.pdf
    • https://s3.amazonaws.com/sasufufa/19490574469.pdf
    • http://kebenubes.onlinewebshop.net/jidujirenofux.pdf
    • https://s3.amazonaws.com/xujitezu/xopopojikugegekasasasumi.pdf

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