Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96da61e3097234b…

MALICIOUS

PDF

73.3 KB Created: 2021-03-27 20:59:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d3e459a51e145241384a407aa1271e90 SHA-1: aed35aedd127401cc9cf0e280ba7540e9bb215ab SHA-256: f96da61e3097234bf1b316164852c0637eaf67ba2a12e00af7e2679a9b3070d0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'mezovuduw.ru', which is likely the primary destination for the attack. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external links and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/123?utm_term=capital+case+google+sheets PDF link annotation
    • https://cdn.sqhk.co/rokabumake/w3aD9gj/tic_tac_toe_home_friends_app.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/93240650496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390056/normal_6019cde425645.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvopone/h4ghDEz/hello_chat_apk.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/the_100_season_6_episode_4_synopsis.pdfIn PDF document text
    • https://cdn.sqhk.co/kanemili/bgcIhgn/real_racing_3_apk_obb_revdl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489441/normal_5fc8b4cfa39c3.pdfIn PDF document text
    • http://gebevojika.mygamesonline.org/summary_of_the_little_albert_experiment.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/Ohd9gh0/her_story_walkthrough.pdfIn PDF document text
    • http://zojesawusiniw.22web.org/poxeve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380395/normal_5fe54ac8a2074.pdfIn PDF document text
    • http://raxajifiwovoj.iblogger.org/registered_dietitian_resume_template.pdfIn PDF document text
    • https://cdn.sqhk.co/firijanab/jgjc5Qr/gipelunexuvizu.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/6891d302-91e1-46a7-876e-7783f3225566/46325136025.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/less_than_zero_movie_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/dell_1704fpt_price.pdfIn PDF document text
    • http://dugupafado.epizy.com/47474758682.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/lejuxuparitalad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad6ae74-cbd0-4eb7-bae4-87b4f7764de0/fudepotegiketikipeluvoduk.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/how_to_replace_hose_on_bissell_spotbot_pet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e5c2df-8dae-4c0f-a704-3a8f38b4072c/pigekage.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/agyo_privacy_manuale.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_off0000ddfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFA 5004 bytes
SHA-256: 657e7a1bd113687aa15fa2f9758b93305f197699798d8ff0be888249c42e5aeb
font_01_sfnt_off0000eef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF7 11472 bytes
SHA-256: 02d8736723b15690ba040bc13d9215518d5bf5ed344f16920057f3485fe9dcd7

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