Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e82a725a72744ba…

MALICIOUS

PDF

87.0 KB Created: 2021-04-03 04:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d56ef04b8ac413e7fc8fe409cab02219 SHA-1: 1b3b76eabac2adbaae5c1e6e9572ff027fc0a3ad SHA-256: 6e82a725a72744bafb1f032a9cc500472a6f503a8524ff9a9b28409b55feba68
136 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a browser extension installation lure, a common social-engineering tactic for malware delivery. ClamAV detection and ML classification further support its malicious nature. The embedded URL likely serves as the initial point of contact for downloading the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://jottigo.ru/wix?keyword=unblocked+games+tetris+jungle
    • https://cdn-cms.f-static.net/uploads/4450512/normal_6034d5495e592.pdf
    • https://static.s123-cdn-static.com/uploads/4443372/normal_5ff8edc4d6136.pdf
    • https://cdn-cms.f-static.net/uploads/4414847/normal_603e16e56a6a7.pdf
    • https://cdn.sqhk.co/dilobowuz/fieijVF/alarm_clock_background_music_free_download.pdf
    • https://cdn-cms.f-static.net/uploads/4378852/normal_60158e8f676d2.pdf
    • https://cdn-cms.f-static.net/uploads/4457582/normal_6021f86b8af4f.pdf
    • https://static.s123-cdn-static.com/uploads/4374360/normal_5ff3f69ad36a1.pdf
    • https://static.s123-cdn-static.com/uploads/4409421/normal_5ffd54a7ed6bf.pdf
    • https://cdn-cms.f-static.net/uploads/4483610/normal_6022cea28bbde.pdf
    • https://cdn-cms.f-static.net/uploads/4376086/normal_604677d02a8e4.pdf
    • http://wuvigirigu.22web.org/bahubali_ka_gana_karo.pdf
    • https://cdn.sqhk.co/bowewulaxam/ia6icNr/lasers_retirement_benefits_calculator.pdf
    • https://cdn-cms.f-static.net/uploads/4388062/normal_604b27f443998.pdf
    • https://cdn.sqhk.co/bepotedaxus/jfDovjc/biophysical_techniques_book.pdf
    • https://cdn.sqhk.co/daxerarugak/ihijlEH/kakeg.pdf
    • https://cdn-cms.f-static.net/uploads/4458623/normal_5fd1a5c684122.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f6f91901-07c1-459c-bd85-33be1fd8dbf0/sig_sauer_p226_scorpion_vs_legion.pdf
    • https://uploads.strikinglycdn.com/files/a95e330f-f3ef-4f23-b7d5-6193d3547ff4/whens_the_next_new_moon_uk.pdf
    • https://uploads.strikinglycdn.com/files/5e043c79-3501-4f49-b8b3-4030a2f689dd/zodusifefuwolel.pdf
    • https://uploads.strikinglycdn.com/files/a2a6345e-88c5-460e-8433-89ee9fec92da/66251488301.pdf
    • http://davojuke.epizy.com/pojelivulogibuwekidopos.pdf
    • https://uploads.strikinglycdn.com/files/b8e5718f-cdc4-4c26-853b-bc0c9ab99d98/80817264275.pdf
    • http://vavijirodujozi.rf.gd/61211299476.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011768.bin
536505d2fd3c5d90a41858ae4717e7c4d4c27ef92802dde5b0b296f0881f7f16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11768 5528 bytes
font_01_sfnt_off00012a24.bin
39fc250ba6ddd24025af944d770987928609f326a98d7c0c1498d28425c207ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A24 10808 bytes

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