Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69fe25916a74f45…

MALICIOUS

PDF

87.6 KB Created: 2021-08-18 05:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2e31651bc56155e43656058b1bef6c99 SHA-1: f517149a335be5a6a4e3cc3c4c3f14e7a81f3236 SHA-256: f69fe25916a74f45cd9a2f3f2962bbad654f7841214bd75537d8d455145d7bce
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or raw IP addresses, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9008

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac455336a6a---lalulapetipinopijifog.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/767968e890584d9921c7b67bbae590b0/rikajujafejezojege.pdf
    • http://gintaras.cz/userfiles/file/negigeserudugojatetibub.pdf
    • http://dh-cell.net/ckfinder/userfiles/files/94034035631.pdf
    • http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/pirufijevefegejawikadoti.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/3d288623f632ecf41a427039abb5e8cc/fedumi.pdf
    • https://basalyemek.com/ckfinder/userfiles/files/2971695080.pdf
    • https://www.aeap.com.br/ckfinder/userfiles/files/25647428350.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160bfad8ce9c66---papanosu.pdf
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/80787668288.pdf
    • http://chono.mn/uploads/userfiles/files/93297401852.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/bb67v8nppdesbam89mt47h5c0s/88921131755.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160860fea5f9ba---87518476692.pdf
    • https://juhaszautovill.hu/userfiles/file/54796327224.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77a4edeb45---80460689844.pdf
    • https://actorconseil.com/files/file/91976144398.pdf
    • http://stopguepes72.fr/userfiles/file/24792235962.pdf
    • https://u-spot.biz/js/ckfinder/userfiles/files/23373317474.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d00f6e3fb75---butukosufuwadexaw.pdf
    • http://etasystem.net/userfiles/files/5981119526.pdf
    • https://placute-frana-dispaco.ro/userfiles/file/56923222889.pdf
    • http://ihdbd.org/upload/files/82891202571.pdf
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/timasulodamikawupako.pdf
    • http://navigator-nsk.ru/userfiles/file/jesuxirosikafimi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=honors+chemistry+semester+1+exam+review+answers
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101ac.bin
6deb80fbad1f792fcfd6053ea9c577cc775126437808a8c23df8f4f971e20e71
pdf-font-stream PDF embedded font (sfnt) at offset 0x101AC 10860 bytes
font_01_sfnt_off00011aad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAD 16792 bytes
font_02_sfnt_off000132bf.bin
aedd2c634bb61e8c963e174abc8fc5d64a18223ab591fc7012031b16f611d314
pdf-font-stream PDF embedded font (sfnt) at offset 0x132BF 17476 bytes