Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3b538cd4dba62f…

MALICIOUS

PDF

78.8 KB Created: 2021-08-29 22:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ff595a0d01b35c74188bb6e6965f11e0 SHA-1: 5893c6b76c93aafb087c67672421e27c6a551ad7 SHA-256: fa3b538cd4dba62f3790cda81ab62e9ccfbdac7cf6e58924da4df15c20bcd7cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://deccanquest.com/konadnew/userfiles/file/ruligavixekavupenubog.pdf In PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3d18e84b4---22406315812.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160714fc15763e---mubebowovejijapulasopago.pdfIn PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/43147027513.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/furabafolo.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/49859830073.pdfIn PDF document text
    • http://kramor.bg/userfiles/file/nupodosejulefubelobaz.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/f7af47fa742d10b67cdc74b40d4fefb4/80742212970.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210625093232.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/rodiruduv.pdfIn PDF document text
    • http://jinohair.com/upload/files/rawaxedezodakup.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f687ec1590---50868345441.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f6de1dcd7---35054561338.pdfIn PDF document text
    • http://thetachikappasigmaalumni.org/clients/5/56/56ac51e2ee760b54d3ff8b7d53c877b7/File/21786371746.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/36020211844.pdfIn PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/96364450515.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e55c203eadd7dba185ecbdae44f843b3/dokupevizidakikokan.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/zovigudajixow.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/2121675510.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/ragepofewovafu.pdfIn PDF document text
    • http://safetypath.net/cms_images/33429052701.pdfIn PDF document text
    • http://insuralead.com/userfiles/file/62051323993.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/zipajo.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210821_2A38A15B600B74FA.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=attending+skills+in+counseling+pdfPDF 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_off0000d422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD422 10704 bytes
SHA-256: 208c466b932a00c7060c288664fd38b73d3dc9726332338875bddfe9d52952b5
font_01_sfnt_off0000eca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA2 16052 bytes
SHA-256: 489542bc1625b280eb2831ecf9248b7257e238c04669497ca1e5e5ea3fec6805
font_02_sfnt_off000115ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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