Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46b78b9ec5ff0e1…

MALICIOUS

PDF

82.1 KB Created: 2021-06-14 06:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1be2bd9a0d0a74d33dcc9d05523e8705 SHA-1: 6ceb718865477d56355c69d4486e13109fd3a84d SHA-256: d46b78b9ec5ff0e11aa2046818b42e10def5c4788261e0341912e8a43706e399
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to compromised WordPress upload directories, suggesting it is part of a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9382

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://irlanc.ru/uplcv?utm_term=ps2+damon+games PDF link annotation
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9c1c67d8c---3414521861.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4e0261ef8---95365599540.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f29a6f4097---pewoj.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/2973ba738a2994a789010ae15a62ca61/58872283839.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbd5091b0b---5323286411.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/kitowidarodabikadofe.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a632879cb93---19713388510.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/76f0bb2d424621220972c23bcb10726f/musudadixefabujefebuw.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ac1f8c9ee---81501713342.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cc5c08c65---muwutabilekopu.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/892d67d75596982a69320e67ab545ebc/falifukumozagotinedejaso.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4afc51afa3e948d9d58f4cb7fc8cac78/soxojifo.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16071379327a47---84973882354.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/34492262367.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088cc1d2f452---sowejeteve.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/31f30abe911dd5206f9addd8d4f0d85a/68132309856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001119f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119F 5152 bytes
SHA-256: 147da8d55bf164af0d3d27d2d5584abaae3c2097ef0d866884be7b2ce39fc3ad
font_01_sfnt_off00012318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12318 10860 bytes
SHA-256: cdb62e381e9d8ef18b16c9d7f2abd6add21b49e7a59b8bee92c97be06e357a5b

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