Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26fd6cda51b6f69…

MALICIOUS

PDF

100.1 KB Created: 2021-07-29 23:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5c578e0cb71cff401146dcc00d2b66b1 SHA-1: a2dfb9c7680f058b05d6c46f79400986e94dbf88 SHA-256: c26fd6cda51b6f69ad9097530db92ea4589d4013f019351192495897f5a5b474
94 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, indicating a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9139

Heuristics 4

  • 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://libertyquad72.fr/userfiles/file/85866162119.pdf In PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/8dc6759b32074309830021293cec42ed/xisoxisoliludogikor.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/gonene.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/bofojemefobitijojufujex.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b916f59a422---jenivetomafe.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/39171273509.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210721131759.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/62234808072.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/burodi.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16094070db7a87---wasusagifuvolen.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/fewelaf.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945c9792c4e---javuxoxemiri.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pjsridm26439jh69fra6jj0kl1/56422493146.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/jikexorivepegusimap.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/705986426.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/wetojovumu.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c03a38b8e---69850069195.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb33917f35---bexavaleteledoma.pdfIn PDF document text
    • http://c-amc.com/upload/files/92391185545.pdfIn PDF document text
    • http://metrokentakifinan.com/resimler/files/gobizineripi.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/52ecb307c5c2bcf02c4607a8cbb5bde9/tumewogesetarunonafumi.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/sodatekuzuvose.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=organizaci%C3%B3n+del+departamento+de+grupos+y+convencionesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001430b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1430B 20084 bytes
SHA-256: b1c5c33cfea0517baa316342383a00b04b83f31dd81f93500054951ef7b20f48
font_01_sfnt_off00017720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17720 11360 bytes
SHA-256: 9ed045e65ba59f1926d50f8ad6443e058e33f15f5fa9110ded928828e2587612

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