Malicious PDF — malware analysis report

Static analysis result for SHA-256 24462a140f0833af…

MALICIOUS

PDF

85.9 KB Created: 2021-08-11 15:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f831b27252e71dfe1de595496e254056 SHA-1: 5f5f06a44afc413563e4abc30fd3f18ab9883160 SHA-256: 24462a140f0833aff9cd31e146bc528858776096fdf172c1dc2f606f717f4f58
154 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of multiple PDF links and the 'link farm' heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5029

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://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/154ed64d34f06aea80db0046ca3b30d4/wasuludusabuzobowelefixe.pdf In PDF document text
    • http://lagunaapartman.hu/images/user/file/38948676533.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/21062947906.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/e3d3aeaacf29b9b8eefcfc8e72646244/tapoligodiruxa.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a157353f78e---wagemisegexan.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/e77182be6f8714d928e4d623a13ae25d/63096814127.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16082ab66e21bc---64085945835.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/98811514465.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/atg374bmlehvq2fdbd7jns9f47/ronolodisenulole.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/lezixilijazoxuxekutisum.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/zokinilomezo.pdfIn PDF document text
    • https://ready4use.ru/uploads/files/87108987548.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/2ad27e0564fc239c5bcc886c698926d0/76183290822.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/2oojlvqk504lhroqqal3mlg1op/79303162392.pdfIn PDF document text
    • http://emannsltd.com/userfiles/86718196430.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210621/file/16242520473318.pdfIn PDF document text
    • http://2440027.ru/upload/file/15628732696.pdfIn PDF document text
    • http://sakra.sk/storage/file/65050282690.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/34932026879.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/c0506a3ac0ead928ac5956bfc8a5b222/69633142846.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/319ab1332ecbbef1efb2400d7aad07c8/kujixatodosatenuzo.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/birojobaxemaruwi.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/korulutuvofe.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/17eb1587a7e5cdd2e3f5bfe7ed0c386a/lipowekapomevataxurej.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210724100457.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/60112378827.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/37429312299.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/gumulowinopid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=mortal+kombat+x+sub+zero+move+list+xbox+onePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B14 17588 bytes
SHA-256: 8ddb0d53f84f95281cce8ed1b3a425df856911052ec43f7ef0d98ebacde8d6ff