Malicious PDF — malware analysis report

Static analysis result for SHA-256 67606d41d90de9f1…

MALICIOUS

PDF

92.9 KB Created: 2021-08-01 17:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a03acafa7cf7919e676cfe750f4b3b24 SHA-1: d4e415caf29831999e236a9f63a1867bb13db0fb SHA-256: 67606d41d90de9f140e10081824a3d828bb65dd9d96aa8e1170d24bf71664bf7
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to lead users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/16469533375.pdf In PDF document text
    • http://projectcom6wrk.net/ckfinder/images/files/87779369009.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/32662560862.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ge30vbkeap661j67h4edjl1eq7/61042915454.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/4gbj9i28t775bc57o9c6vg307o/fuwelekusiranitivujikuwag.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc8fdd86e3---nefuzujobamotadamisuvo.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/8c1168dcac86ebd3c8639531293a9ec4/dujidep.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/27622691534.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b3dfd28a4---75874524422.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ea57b5ba0---40321701610.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/desavowenopuvuroji.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/wadopamodep.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/11560941173.pdfIn PDF document text
    • https://www.dars.bg/ckfinder/userfiles/files/xiveba.pdfIn PDF document text
    • https://coil.hk/upload/files/30970942148.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1261104dd---41359601230.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/e23d69cef9ae13f166d14d213fa162c7/potanefiwajowumig.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/73mam4clq61il8repi4mth9ico/mutomosasusoluf.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/16129502027.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/60133171125.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5f8bd34a2---23570587309.pdfIn PDF document text
    • http://cuanhomkinhtoanthang.com/media/file/kiwugoxelojupud.pdfIn PDF document text
    • http://fabtur.ru/upload/files/46502454014.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=julius+caesar+act+1+all+scenes+summaryPDF 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_off000103ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BA 19380 bytes
SHA-256: d2d54fd03437160fa135a64492fc8d5efb36f11e71c31f6553a1024e408d5ce2
font_01_sfnt_off000135ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135AC 10528 bytes
SHA-256: 02a7bf436d6c98db31a8701547a56b826a9f1b747b67f30f458bfd01dbedca7d
font_02_sfnt_off00014dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1