Malicious PDF — malware analysis report

Static analysis result for SHA-256 2371b3d50b8eabd7…

MALICIOUS

PDF

85.9 KB Created: 2021-09-01 08:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 01e6997be854836e1bd5eb3870518f83 SHA-1: 05a35cce05fd1ec6f5126892d6e1901dff16f47f SHA-256: 2371b3d50b8eabd71fe7cea0e80e71e89e6aa7a667c47909bbfff94d59fe5388
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed numerous embedded URLs pointing to various domains, many of which appear to be associated with compromised WordPress sites or disposable hosting. The PDF structure and URL patterns suggest it functions as a link farm, likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.1831

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://cructi.ru/uplcv?utm_term=how+to+get+bots+to+play+music+in+discord PDF link annotation
    • http://szentistvanpatika.hu/upload/file/55793366529.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/3ff5927938cafc88197266e30e67ae33/pikejobutusujakejeni.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202165132227885.pdfIn PDF document text
    • https://nestuby.com/userfiles/file/82153636675.pdfIn PDF document text
    • http://thecoferfamily.com/clients/7/78/7892d776c92a08c80f86ebc6236678d2/File/lajelosivufaki.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/msoqko2q0nsan77gt56bi5pnb1/mudawobujane.pdfIn PDF document text
    • https://hssanesteban.cl/files/woxufatawamemibuwivobadav.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/digagi.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/72206551720.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/wifafizesorugovasenem.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cfafd653dda---binelanuwigito.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160af79127d9a8---67008833696.pdfIn PDF document text
    • http://chinalabware.net/d/files/jifeb.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/rg83dojgjgnid62hnh8oin5tt1/40166198694.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/9840dcbbf49a84980274a4e183b0766f/2256544534.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/nibilapesatoxoxazimeret.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0cc0a05c908a7c46d3540dcd3d7a79ec/74859435184.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c459f14ad---21843309124.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/33483039946.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/cieei6d7usso1i40q57e7j24so/72476142650.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad95952b3d8---38285248746.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/55302167882.pdfIn PDF document text
    • http://speckrepej.com/upload/file/18877805904.pdfIn PDF document text
    • https://beautydent.hu/editor_up/bezoluzekole.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/57903436033.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/0otb8ft3d6i8fp4fntp66ufj2d/32442103333.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_off0000fb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11362 18556 bytes
SHA-256: f7fe2d537b214b7ccec257023e0d893857cdf038b388b1cf4f88627b7c16a630