Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e422619195fafe…

MALICIOUS

PDF

76.2 KB Created: 2021-09-08 01:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 64a4b1bdaedd3770ba006932e58ea8c5 SHA-1: 37168a2ddc7b7fe310ecc59c83336829d78ce96a SHA-256: 24e422619195fafe3c12e6aa8f235210be5b592d3802ee92475ef957ff4e5f49
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5631

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://fokusmedia.com/images/uploads/52691605020.pdf In PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/5113996237.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/64482514292.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/xamobipumap.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/vanipuworujezixinoxawosog.pdfIn PDF document text
    • https://quaint-house.com/images/blog//file/vurogemujulaxeposikewasid.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/1021cb8f27411d1e4f91675bb36c5971/gefovawelug.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/weribaxazewunog.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/27813954343.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16100f7458a08b---32431751933.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608844329fd59---87888672548.pdfIn PDF document text
    • https://digireg.org/upload/gofubipufi.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb4f58f930---50847223852.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/vovuxaletedoxivulilulomun.pdfIn PDF document text
    • http://high-keenltd.com/userfiles/file/38902708368.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/79445387042.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/11219536902.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f2a7adbe9---79752469381.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/b9afa4850e8b1fcd50ef68ccd52d80b8/firoruzawetedep.pdfIn PDF document text
    • https://pasarantogel2.com/contents/files/mavemusakuvatut.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/286a5af0a6cea2a8936b3bce68895315/8873416484.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac8353aacb---mudilazuvuxofurobo.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/vuxigelazilararesase.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609712b546024---xubebazabuvuluwumenekosa.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/papanojukebuwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=fuji+xerox+docucentre+v+2060+manualPDF link annotation
    • 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_off0000dd06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD06 11148 bytes
SHA-256: 52f568747cb80b56f951951d62a61933c1c01ddee7d2a046c68d8df8f87729e3
font_01_sfnt_off0000f70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1