Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6811f9de7f5ae8…

MALICIOUS

PDF

93.6 KB Created: 2021-09-13 03:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: abbe462bfc77d964a9549cc353e42a73 SHA-1: 062c1b775806dd08d9283cb34f91139718f36cf4 SHA-256: dd6811f9de7f5ae8d9201c28a244f92b88a7e7edd18be03b1bcf0f7912503475
214 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating a malicious intent to download and execute further content. Heuristics for 'SE_CLIPBOARD_COMMAND_LURE' and 'SE_CLICKFIX' strongly suggest a social engineering attack where the user is prompted to execute commands, likely to bypass security measures and download a payload. The ML classifier and ClamAV detection further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=payment+method+android+studio PDF link annotation
    • http://ort168.com/upload/ckeditor/files/pikujoresup.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/kefifigajesabogelevip.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/pakasigigezudibijukafogon.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613637b6c4b1f---kosigoborawatexem.pdfIn PDF document text
    • http://homokkepek.hu/editor_up/mabopoveniluguxiv.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/mawopidimi.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/xariru.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/34973582024.pdfIn PDF document text
    • http://hk-keber.de/images/file/badutazomo.pdfIn PDF document text
    • https://pu-sk.com/app/templates/js/ckfinder/userfiles/files/janomifujetesuvefijaxur.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/18130634922.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/46202395634.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/50579168050.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/51732319142.pdfIn PDF document text
    • http://tichdiem.surecare.vn/uploads/userfiles/file/savetisonujalivowiwonu.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/kabasigitelika.pdfIn PDF document text
    • http://potlista.com/file/files/4568287406.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/bavifebariberejunog.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/zodig.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/2034062531.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/zezolevufanumamejikom.pdfIn PDF document text
    • http://shahgrp.com/uploads/36886099125.pdfIn PDF document text
    • http://ex2010.com/uploadfile/file/2021091104251473499.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136771447e1a---37975852688.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CF 19072 bytes
SHA-256: 529edfc4e52e65b97ffc934c7f3aa3f25e19f1d4c23edb2c27cc26d31a67a42d
font_01_sfnt_off000137e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFF 10684 bytes
SHA-256: 15f84bcdb25fbdbf163c4887c21c44364f68bc741309173eebffe43d18c2be81

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