Malicious PDF — malware analysis report

Static analysis result for SHA-256 406288d2d8293900…

MALICIOUS

PDF

72.6 KB Created: 2021-09-27 16:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a68345a8ff36089c765081c51a444555 SHA-1: 48f90ed43eaadcb362304b56a0fe1475751cb850 SHA-256: 406288d2d82939000fb394c7ce8f4495eb406625f64db19c7ba70a52f8357908
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address and others hosted on compromised WordPress sites and disposable domains. These elements suggest the document is designed to redirect users to malicious content, likely for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://randoquad72.fr/userfiles/file/tefozovaka.pdf
    • https://wineuniverse.us/userfiles/file/48585459731.pdf
    • http://tropo-design.com/ckfinder/userfiles/files/varakodutamanar.pdf
    • https://onutglen.com/caningest/images/file/62150554227.pdf
    • https://bmw-zona.ru/uploads/file/woxexujatezovoliduj.pdf
    • http://mega-gold.com/userfiles/files/nipozitafosatowuxawoduzod.pdf
    • https://bagstyle.uz/images/file/70717959530.pdf
    • http://hotechike.com/files/files/vodefamitidizumura.pdf
    • https://greenbins.ca/ckfinder/userfiles/files/94457389798.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614163d79b5b7---razerekamegofado.pdf
    • http://140.121.125.49/ckfinder/userfiles/files/20210912_224243.pdf
    • https://luckyfood.itweald.com/uploads/files/613236a6e11ad.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a3475b59c0---nozebokegex.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/af79ba98acb0d53a6219cce6fd8fccef/71491852844.pdf
    • https://designclarf.it/file/jowarubatosegasa.pdf
    • http://villalapinetafavignana.it/userfiles/files/zegisomezajekifusumak.pdf
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/29550956261.pdf
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87263566778.pdf
    • https://www.iieng.org/editor/ckfinder/userfiles/files/23592975086.pdf
    • http://amidoux-peintures.com/ckfinder/userfiles/files/33849979014.pdf
    • http://lednotice.com/userData/board/file/81124576026.pdf
    • http://clubesquilacoma.com/uploads/files/vunogefeluwexap.pdf
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/50174704445.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=windows+10+single+language+64+bit
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2a9.bin
46a101c0a777335f90e297d83fb6ce1ec04e4e3c9c21ff44807a154196d32c32
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A9 18648 bytes
font_01_sfnt_off0000e323.bin
9463d7579b6ab08bb93aaf4027fbf1ce7670dacd5a1f898cbe3f755ba4fffb00
pdf-font-stream PDF embedded font (sfnt) at offset 0xE323 11064 bytes
font_02_sfnt_off0000fcf1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF1 16792 bytes