Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb13d8d3be882c2e…

MALICIOUS

PDF

81.3 KB Created: 2021-09-12 20:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2833c19bbecec3a1b218972cb94a7610 SHA-1: 7673f22ab217a8f05b14423e38e6cb528dbb6497 SHA-256: fb13d8d3be882c2eb2314d5d5ad4f9437de3bd251fdb54ce1c2f7912936e7b65
174 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a link farm and uses a fake download button lure, combined with password protection instructions for an archive. This suggests a phishing attempt to trick users into downloading a malicious payload. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://datajournonepal.org/files/surugararisivajen.pdf
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/90693659186.pdf
    • https://bahceneryaman.net/public/content-images/files/xuvikunevaxadanezokuxijo.pdf
    • https://nichecnk.leaddeehub.com/userfiles/files/5667181181.pdf
    • https://obermeyer-modemarkt.de/upload/file/mejulupazanamik.pdf
    • http://springgalleryng.com/Images_upload/files/mepegukijedizo.pdf
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/kanopul.pdf
    • http://syekp.gr/sites/default/files/file/jofivugejukexi.pdf
    • http://premiercontainerlines.com/media/ftp/file/tagofuxer.pdf
    • https://euchebnici.com/img/file/78719099327.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/9bbfneurgfqtc0v7p3dk9j9079/79108915089.pdf
    • https://toppelletmachine.com/d/files/duridejuxoxikirofomerabus.pdf
    • https://vili-al.com/uploads/wysiwyg/files/88158048484.pdf
    • http://prepearl.com/uploadsfile/42522329482.pdf
    • https://houstoncoinclub.org/FCKeditor/file/pofumumuxibo.pdf
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/nudowasoxerubuxurasowonu.pdf
    • https://zweefvlieg.net/userfiles/file/mimaxo.pdf
    • https://nepalihemp.com/ckfinder/userfiles/files/69247838904.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/57f4171cfac0a5715b1fe265a4681d7e/zurigisuwegi.pdf
    • https://kanat.com/upload/ckfinder/files/lugewimalatodawaxenexo.pdf
    • http://saga.diamonds/uploads/ckfinder/files/tidipalodipaluxefelaxeja.pdf
    • https://vishalahospitality.com/ckfinder/userfiles/files/remilikegisud.pdf
    • http://colegiosantarosa.com/uploads/imagem/file/xejipinedusosijabi.pdf
    • http://herve-coiffure.ci/files/tadosifefusujonekozadaja.pdf
    • http://levne-pohary.cz/UserFiles/File/25605208851.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=pubg+obb+download+highly+compressed
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8f8.bin
7ee8937c5a440864ea7fe77a3791c81404acade816de1f19a5db6222f8bba7f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F8 11304 bytes
font_01_sfnt_off0000f2e8.bin
65b9edab1aa50b069074101ef7e4c9c97e5ae7f997a88a219cf1ce3941eed76c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E8 17252 bytes
font_02_sfnt_off00011f4e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4E 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.