Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbe3354ceac67c3…

MALICIOUS

PDF

81.2 KB Created: 2021-09-16 16:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 290cfa2e976d40062f70e59097ffb1a8 SHA-1: 8ddc36717c15d15847b14856e6fe3ab53941e33a SHA-256: 9fbe3354ceac67c3d7490cb50c6912ab40a42a16c38cca8212b9891e888b0d08
174 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and multiple external URLs, indicating it is likely part of a phishing or malware distribution campaign. The 'Clipboard command execution lure' heuristic suggests the document instructs the user to interact with the command line, a common tactic for executing downloaded payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=ms+dhoni+movie+download+torrent PDF link annotation
    • http://vimar.ua/userfiles/files/32981088976.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/06aecf99e77163efbac4c93f5edfd87a/mekojifuruvemigenube.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/54559293216.pdfIn PDF document text
    • https://ms02bet.net/contents/files/98373609959.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613c889ab3abd---mefamivodivufudidedere.pdfIn PDF document text
    • http://bn-biz.com/userData/board/file/bosolomoputirixi.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/fezotililemisidirasavewu.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210916185719.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/mudotarugipopobabugakazi.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/sivisulagokaposubej.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/xojefabotawolubute.pdfIn PDF document text
    • http://idolyokocho.com/js/ckfinder/userfiles/files/20926948177.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/mujoxezokutelagovawovose.pdfIn PDF document text
    • http://abwrva.com/uploads/files/1526551547.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/94037959208.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/konakasexil.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/jekufavalu.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/razek.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///41594222268.pdfIn PDF document text
    • http://lnhaihui.com/userfiles/file/20210908094441_585787723.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/50798255785.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/sumupa.pdfIn PDF document text
    • https://bak.vn/upload/files/nabis.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/febunajopaxuxikike.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_off0000d89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AE 18008 bytes
SHA-256: bdc5fcaa48ceb18aacae8c32407b58ffd567ee4d0372a7509e585ec46549744d
font_02_sfnt_off00011f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0B 10656 bytes
SHA-256: 7e0a975ae61480e930eb8df5b869bdc0d0e6a6b81314d8db37d1322fdc9168fa