Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af134b69eeb058e…

MALICIOUS

PDF

55.9 KB Created: 2021-09-27 07:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 78974831eb3cd1f4182541241e6c6c70 SHA-1: 7d1ff47377251d95ec41096209434370173f9649 SHA-256: 2af134b69eeb058e43466d0db5f28c771765a1389089fee18dd9865645e6b4a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or link farm operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8051

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://allytemp.ru/uplcv?utm_term=the+power+of+now+in+tamil+pdf PDF link annotation
    • http://iucecb.com/files/file/gakonipoxurepojatanolume.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/74041775520.pdfIn PDF document text
    • http://ayrh.internet-match.com/upload/files/24797191559.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/misukidosuxu.pdfIn PDF document text
    • http://henghuitong.com/jingkelun/userfiles/files/20210913011107.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/50797228261.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/luxifufokopakepe.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/84501704335.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/68169058744.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/98260452811.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e07b5d9581---76629887141.pdfIn PDF document text
    • https://ifunb.com/shopadmin/upload/files/lurodulolunibuloje.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16149494d21b00---sosivasipezibu.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/rubojeramezusadaj.pdfIn PDF document text
    • http://dajia1.com/upfiles/editor/files/95813095444.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/82704245142.pdfIn PDF document text
    • http://baoveantam.org/upload/files/86007863682.pdfIn PDF document text
    • http://tt-ural.su/admin/ckfinder/userfiles/files/84789777908.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/jopenawabaton.pdfIn PDF document text
    • http://arniuniversity.in/ci/userfiles/files/lasonabilotadovek.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136c6c87a321---vimebixamafuveba.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_off0000b05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB05B 10644 bytes
SHA-256: 1d7ca2b1584a6a0e0bf4acf063017fe8995c382a1c2ca582b1034aebe7354213
font_01_sfnt_off0000c888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC888 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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