Malicious PDF — malware analysis report

Static analysis result for SHA-256 195bf6ac7f37f04b…

MALICIOUS

PDF

81.4 KB Created: 2021-09-12 02:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ccfdf5a5b36d8f800edf869220c27e69 SHA-1: 40a945181911bf6f1ce2d67ac449339c3116e47f SHA-256: 195bf6ac7f37f04b7aa9bcbb6563b5c2fa5a2666a55a4222fb56e96718665f1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure suggests it's designed to lure users into clicking links that likely lead to phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312adc43c0e---mazix.pdf In PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sujasame.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1b0519d3e---rozusoruw.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346c807175c---sovuwogosojitez.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/16410ab1911afbce00f077aa804bb65d/vanepapexajawu.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/jaxuxesa.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont/file/vapozebepakexiwunakoma.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/84257784447.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/78142187507.pdfIn PDF document text
    • https://durimawar.com/contents/files/bober.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/besakuli.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/rusija.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/61814817326.pdfIn PDF document text
    • http://cutskytools.com/d/files/puret.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/51390536726.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/rexevowupizadolos.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/91250054696.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/xuxazipetotonadok.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/sumagonomidu.pdfIn PDF document text
    • https://springkasteelhuren.be/userfiles/file/75102856954.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/41185353904.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=gta+san+andreas+mobile+cleoPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CD 17560 bytes
SHA-256: fbe72d90a3649f6cc61cd6a25b495fe976ed9a8e5f743cbaef0b519276d50e84
font_01_sfnt_off00010776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10776 10712 bytes
SHA-256: 86effa2e2f8b1c8a1dfd9d34f00134f25025a877fe48366ae678b4a9f07d0def
font_02_sfnt_off0001200c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1