Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef77b6148c6db96…

MALICIOUS

PDF

86.2 KB Created: 2021-09-11 11:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3404b37cf191a173dee837fd180ba90a SHA-1: f6295e769a36a28665cf29359421419390e06148 SHA-256: 5ef77b6148c6db96a0717fcf3c578c11b5709a140c3ab76173a4c1a09db42bda
166 Risk Score

Malware Insights

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

The file is a PDF that was flagged by ML classifiers and ClamAV as malicious. It contains multiple embedded URLs and a heuristic firing indicates it attempts to lure the user into executing commands via the clipboard. This suggests the document is designed to trick the user into running malicious code, likely to download and execute a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • 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://kingdomdatesuae.com/userfiles/files/kimawifenojelisu.pdf In PDF document text
    • https://pasarangroup1.com/contents/files/bejupizaxal.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210902091940.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/85158874237.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/muvojitifotuxo.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/bokosakexeguzugid.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/gusadujodugebebo.pdfIn PDF document text
    • http://www.somdattabasu.com/fckimages/file/fedagimemusetetepeborado.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/zovopabexumanipamababo.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/53150276809.pdfIn PDF document text
    • http://dobermanncz.eu/files/67503850998.pdfIn PDF document text
    • http://unstitchedfootwear.net/files/file/zomusipibudutazolez.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/23091043373.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/jewovofejikavuxaven.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/6808966838.pdfIn PDF document text
    • http://lepetitjaunais.com/userfiles/file/kusotulupilotuvo.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/20240529079.pdfIn PDF document text
    • http://fkjz.cn/upload/files/2021/09/202109021153358169.pdfIn PDF document text
    • https://artcorner-fiberglass.com/userfiles/files/xomabufagupiw.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/tugulojurafupujamusal.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/34368726988.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/kajorexemagejaj.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/fereke.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/161367e19f00c0---posatogarifegura.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=kingroot+unlock+bootloaderPDF link annotation
    • 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_off0000eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10332 10700 bytes
SHA-256: 6b5c2365d88337a982efd71734d1ae3ccc2b8a5ab7eec8629ab29979b25890ec
font_02_sfnt_off00011ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA4 18568 bytes
SHA-256: 496b502484c9bb46a1548a0a07f82ad4164b77f9b0fb2157a5a6d9317a9b47c0