Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d4d1657fb12a3f…

MALICIOUS

PDF

89.0 KB Created: 2021-03-22 11:54:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca7736a2293b9a7a22c0c42208f1cc9d SHA-1: 5d7dfbbb8c948e917803a9c107a3726a9a4fdabc SHA-256: 20d4d1657fb12a3f7114cbf88bef3db23e3173abf52a21c139fe4ec6327ae9b1
104 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI and an urgency lure. The embedded URL, https://kuzutuzo.ru/wix?keyword=photomath+camera+calculator+apk, is the primary indicator of a potential phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF format and the nature of the findings suggest it could be used to deliver malicious content or redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=photomath+camera+calculator+apk
    • https://cdn.sqhk.co/mowamukar/vkibXhj/adobe_photoshop_fix_android_4._4._2_download.pdf
    • https://cdn.sqhk.co/bofozuto/Shaohcf/indy_500_arcade_racing_apk.pdf
    • https://cdn.sqhk.co/seworani/ctrsgiu/mukunej.pdf
    • https://cdn.sqhk.co/turanexode/ihhirSH/meviwipugojikarozexixi.pdf
    • https://cdn.sqhk.co/lilomovetum/i2jdJii/41405448681.pdf
    • https://cdn.sqhk.co/juvebuzizej/uihigv1/bubble_shooter_jogue_online_gratis.pdf
    • https://cdn.sqhk.co/jobasalem/EWVLhgl/steam_gift_card_near_me.pdf
    • https://cdn.sqhk.co/xibidodoko/geLDo44/61727451091.pdf
    • https://cdn-cms.f-static.net/uploads/4375503/normal_6018186ed5682.pdf
    • https://static.s123-cdn-static.com/uploads/4501989/normal_5fe0b647dad4c.pdf
    • https://cdn.sqhk.co/bekutojeke/jFSCFmB/dream_riders_of_ky.pdf
    • https://cdn.sqhk.co/govamopega/Ciagcgi/38230405085.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/7f19982e-6f96-4a5b-b05c-e3340de07188/49182590031.pdf
    • http://zunuwovadete.epizy.com/business_google_sheet_templates.pdf
    • http://zemadepa.rf.gd/will_renesmee_and_jacob_be_together.pdf
    • https://uploads.strikinglycdn.com/files/89697a56-fe6f-4a4a-a2b6-a6f6fc1b2948/69575165344.pdf
    • http://wiwekire.epizy.com/bufokugokisamapajinure.pdf
    • https://uploads.strikinglycdn.com/files/089be709-0dbd-440a-afc9-f74125d522f2/wiwoxidaxobew.pdf
    • http://vepuziv.epizy.com/topowazulifogizavogukina.pdf
    • http://rawatakutuju.rf.gd/albeniz_tango.pdf
    • http://zexenodu.rf.gd/16380186009.pdf
    • http://xojodoruxima.epizy.com/31976278969.pdf
    • http://masomivi.rf.gd/tweakbox_app_ios_and_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010385.bin
4138eec5a5b0e77cf36465585e2ef9fa332334fc00d2ec6211244efadb7a84d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10385 4788 bytes
font_01_sfnt_off000113c3.bin
73b0cf1dafdf7604d1bb79c13c273f404ffb72456ce33d8c1d7596b05a171150		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113C3 21444 bytes
font_02_sfnt_off00014639.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14639 4324 bytes

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