Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d295784aaf1d03…

MALICIOUS

PDF

64.0 KB Created: 2021-05-04 12:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2854ba5fe0b17a64996a4511cb85152 SHA-1: d4391e61d6a65512dfcf644868046d39bf7a62e1 SHA-256: b1d295784aaf1d0311a9824477b136c32bf4570c278f778191ad5b284d3ee1ec
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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 http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/slfecanlsp20h1oo4s87ipp790/jitafazifewix.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/vvtjv66q1uo3lstufbqu3cfr4r/fegakanudorivuza.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085259b9482c---50093034498.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160741887cd41c---45022703468.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608778e48f7e9---38051894529.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef135750fa---97481689231.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/4o4pcul1k5hetrorjte80pjpvg/fozofuwifaderemewuvevo.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8e3f59a34---sedewezuxegasesiz.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/n0r1na4p67lm7qveqlh9n1m5bi/zefaposapawalowiviz.pdf
    • http://akcjonariusz.com/UserFiles/file/9637834379.pdf
    • http://altelaw.com/uploads/image/file/58880494197.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723e04d9f04---64333661644.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd03e0b32a---vegimalarimeb.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087593bbe478---19857481192.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=charismatic+leadership+theory+vs+transformational+leadership
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcdb.bin
daf138bfef8be490713e857dc3cb92a2cd5220a6a9ce29b397508461e940a32a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDB 5460 bytes

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