Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c70ce6d9f5de12…

MALICIOUS

PDF

80.0 KB Created: 2021-09-01 18:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2da42bd426007a2f0af9c4954a1df5f8 SHA-1: d5c7a7fd026919ed8dc473b902c081a537c74418 SHA-256: 71c70ce6d9f5de1253f82c33d86c57b2111099e42e2727f9e25ca72bb62f2437
124 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure and content suggest it is intended to lure users into clicking on these links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

Heuristics 5

  • 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
  • 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://inwebjor.ru/uplcv?utm_term=seasons+trivia+questions+and+answers PDF link annotation
    • http://benthanhsgfarm.net/images/uploads/files/juzuwekojinutumifebe.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/18156576469.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/6j84te0g5dl3q25b8e003ga74m/pixonezus.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/juxuzapetakit.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/42510505556.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d03285c7e74---50090296850.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/3fkkckoekokvgihiuj9rvis6t7/69063337605.pdfIn PDF document text
    • http://ewtch.com/upload/files/82884572856.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/sejeb.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/31868444997.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/sajuwe.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/6916296873f0dd00cce7a20abc16dc77/16091128875.pdfIn PDF document text
    • http://ccshecea.org/upload/files/32925132893.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161237c0986ae5---50572517876.pdfIn PDF document text
    • https://33mobility.net/uploads/files/xazibor.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/4996850383.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/pquf6eochtpiqudejbh2n7f37a/87701919164.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/resefuzuz.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd666bed854---5484748698.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/c20d88e7d55620f6e86ebf903f5091a0/zazudisipanovazejizo.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/3bc778582435e860def023e36fbcb25c/pinife.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a909043dc---mazoroderunegun.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/sepusukopibeto.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/10952011781.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF602 17948 bytes
SHA-256: 8e718dfe81d4997f2dd1c432ca2d4ec4950fa6aea628a003104b34bd865293eb
font_01_sfnt_off000124ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1