Malicious PDF — malware analysis report

Static analysis result for SHA-256 780376092614d2fc…

MALICIOUS

PDF

79.8 KB Created: 2021-09-23 05:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 863b99b018bd0d045ebd9caacae53c54 SHA-1: 5b0a1aca01531115fbd60e9806c22e3420ccdfb8 SHA-256: 780376092614d2fcb0c867a60d2c8abc0a0c36b1bd3e150960bef6b6bc1d1fef
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs and a heuristic firing for a clipboard command lure, indicating an attempt to trick the user into executing commands. The document is also flagged as password-protected, a common tactic to bypass security scans. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=forgot+pst+password PDF link annotation
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161414305d4762---pulerelisipe.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/11728619201.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/20721336313.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/46096130271.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/wabigamoliwawunojufogisa.pdfIn PDF document text
    • https://ccs-corporation.com/ckfinder/userfiles/files/85777266255.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/mirerifipo.pdfIn PDF document text
    • https://cyklo-wellness-penzion-palice.cz/content/gekitinarijinokawufawiguj.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210914/054943237.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/6631892046.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/33122965893.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/70653639143.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/42510272783.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/jarivekunidip.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/dibibanozatovufogixi.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210908011022.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/sazajeramaxewog.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/82306163846.pdfIn PDF document text
    • https://konyaalotaksi.com/userfiles/file/22961444852.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/zagunalemobelajofebejina.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/62692623726.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/69452278545.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/puxozebarovixubewufewa.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_off0000d471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD471 10256 bytes
SHA-256: 2ff7b79422cf89c048cff081172c51cf52881f8fe5902ec79006d60eebe23a23
font_01_sfnt_off0000eb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB79 17800 bytes
SHA-256: f7926d45ec78acaae6cb6d800f273e93b1fdb627110ab8ef67e17c378fe4e9c9
font_02_sfnt_off00011998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11998 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1