Malicious PDF — malware analysis report

Static analysis result for SHA-256 45238eafadc0ca81…

MALICIOUS

PDF

73.6 KB Created: 2021-03-16 03:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6ef99dfe11a68956f431b70d0d9873d SHA-1: 5bd847e45ca4536339c197b52b81a7ab0cdd330d SHA-256: 45238eafadc0ca81c7fc6f530758fe0e7c96c4f2e4c9c58e81cc362fc23145f3
96 Risk Score

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 'kuzutuzo.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/award?keyword=carcassonne+game+supplementary+rules+pdf
    • http://fitnesspack.net/3033882297201fxq.pdf
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/wasalopaxo.pdf
    • http://afracheat7.xyz/armor_of_god_kids6tyx5.pdf
    • https://cdn.sqhk.co/xonudutixova/bjcibhg/37442074298.pdf
    • https://cdn.sqhk.co/gunumiku/geciin9/rezis.pdf
    • https://cdn.sqhk.co/xolanikipiz/eieSIie/96882277038.pdf
    • http://domsale.xyz/mepavemukutuzanui1780.pdf
    • http://world-wild-shop.com/569507806347v8g9.pdf
    • https://gadiziwit.weebly.com/uploads/1/3/1/4/131406086/jituli_mudosexo_sojur_faviwulepib.pdf
    • http://guxetiz.22web.org/kozizefenokeja.pdf
    • https://tajupifode.weebly.com/uploads/1/3/1/0/131070450/78a35aec.pdf
    • https://gumabudisipinef.weebly.com/uploads/1/3/2/7/132712006/9bf16a9af4e0.pdf
    • http://ompala.store/beginner_diagnostic_testz7qcr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vuvuvemalazot.epizy.com/aggiornamento_android_10_huawei_p20.pdf
    • https://uploads.strikinglycdn.com/files/c6a0c1fd-fdcb-45fa-ac87-f23dc968e59c/wasusufomo.pdf
    • http://mogadaf.epizy.com/new_south_movie_2018_mp4_3gp.pdf
    • https://uploads.strikinglycdn.com/files/a15f971b-7961-4f20-b7a2-da06383eb3bc/how_to_set_a_watch_winder_for_rolex.pdf
    • https://uploads.strikinglycdn.com/files/3b2a3d11-6203-4a98-8cdb-84875e4456b5/firefox_48_download_32_bit_filehippo.pdf
    • https://uploads.strikinglycdn.com/files/0bcbe9cd-25f6-4a5e-9041-67ed610a0a94/79199353021.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_off0000e30e.bin
6f7ee4da1ae03e46880647b30dd9887c388e2ed8354f4daea0fab551ec5d3e69
pdf-font-stream PDF embedded font (sfnt) at offset 0xE30E 5484 bytes
font_01_sfnt_off0000f5a1.bin
ab792daeb01088f9b4ae231c52881adfc59967f2e40778e88db6cb3039b93042
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A1 10268 bytes