Malicious PDF — malware analysis report

Static analysis result for SHA-256 326413f95807f832…

MALICIOUS

PDF

80.0 KB Created: 2021-07-17 01:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 72b10889950850f29872990ea1fdde77 SHA-1: 4fc29601072d175b1ce5399401a26bab9eb53a5b SHA-256: 326413f95807f8324fff29aafb86b91e788cc1a6875e826ea626e2db247f00e4
124 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed that the PDF contains a link farm, directing users to multiple compromised WordPress upload storage locations. These links are likely intended to host malicious content or facilitate phishing attempts.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/0sp7g2pvjp9b97t5bovh7191q6/xukedowitanemoxuxixi.pdf In PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b3369b1d508---59201644779.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bce8268674---kozalumogix.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/e8d14d5e458b19f322797ab1ceb44a3a/xobudadobekesefo.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a44fc7174ae---38198056099.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/56264092504.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/224a89dfd6053b8cbaf9159772c485c5/59424191573.pdfIn PDF document text
    • http://jp-cable.com/d/files/xawemudozutudiniwuga.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bc9834a28---56656666602.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/mujapagefa.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/83930200768.pdfIn PDF document text
    • http://richfield1960.com/clients/865265/File/45901021436.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cc0cd48fb---73827322590.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a237edd4bd---99947506235.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/1ql6pni98m4hktbvgmo03751oi/46983701351.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/82039784183.pdfIn PDF document text
    • http://kusadasidentalclinic.com/img/userfiles/files/40221354010.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/sogepalexoviposinu.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c217982e8f5---jizanibikasika.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/sorezo.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/4fed6c34d1a4bdc09d8898e74896d084/nenubiwamiboxud.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608744bcb71be---xudulanaj.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b73531c7581---95304049839.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/d551740171b2d08ce1c667c723257669/93699549841.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=online+book+reading+sitesPDF link annotation
    • 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_off0000f4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFB 17332 bytes
SHA-256: c58f7775769267c461f4c5ad84cb305102bb1c520ef0e16a2f37f56229e94d76