Malicious PDF — malware analysis report

Static analysis result for SHA-256 b372c5fa8cdcad42…

MALICIOUS

PDF

84.5 KB Created: 2021-08-04 20:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 052610d700ba6d7f018fb1767e3e822d SHA-1: 3a069877fac4e7f8ba1a36d17ae8fef5454e6383 SHA-256: b372c5fa8cdcad425cb275377324fb3c0d933a778ff8c17dabb0c68ac0675163
124 Risk Score

Malware Insights

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

The file is a PDF that contains a large number of links, many of which point to compromised WordPress sites. The ClamAV detection indicates it is a phishing trojan. The heuristic firings suggest this PDF is a link farm designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2990

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://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/5decg89tr2oki8vo3oiold6shc/94374092509.pdf In PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/2r98o50ltit5dt9869pevsolgl/42943678128.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/24054715522.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/dedodanapupavusimujuborul.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/watorefotevam.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/kurirenokosizupasixe.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/sozapodoburiveto.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/93cb6d5308e3b028fa7fd0d651b0314f/46502835475.pdfIn PDF document text
    • http://topas.lt/userfiles/file/rofosogatubujowa.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/4246479921.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/edd79814378f3db948f6b21373439312/79929220064.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/0377de451627310fb51af4648fe9e567/wixokuxupejituwuvupuw.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/a9d3ce6612e736d9fbd0cda5defd8563/zagalodo.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbe8edebd8---giwodi.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607506512f468---89852841937.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/xanab.pdfIn PDF document text
    • http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/zazaxurewokajebelawel.pdfIn PDF document text
    • http://parkettes.org/clients/b/b3/b30d687fb0e6fb0c44210170e51784d9/File/sevazunexovibuna.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/934a7c3461097ef4f9534cb89d130a6c/55917862090.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/0pltv1fp71fn4garlev8hjnlm1/sepekik.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/r55jq2gagnqojbn45mniqg0h42/remewekana.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/ada25105b1077ce2ec94b455e16529d3/rigopi.pdfIn PDF document text
    • http://1960ihs.com/clients/e/e0/e0b58928a48036c9af8d6cfc9cffdd99/File/6535264455.pdfIn PDF document text
    • http://klientskazona.radeton.sk/ckfinder/userfiles/files/52406872053.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=is+netspend+freePDF link annotation
    • 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_off0000f648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF648 18332 bytes
SHA-256: cb212c399d7c505d163762ef666456dda46336a6a064dbed79544aaef25cd14a
font_01_sfnt_off00012733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12733 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F4A 10020 bytes
SHA-256: bd9ac5d80256ae4286fcbf88a65002e8ac31aa68dc1757dbba3ae1c2b0bb2276