Malicious PDF — malware analysis report

Static analysis result for SHA-256 8edc283fbffce267…

MALICIOUS

PDF

72.2 KB Created: 2021-09-29 12:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2d8cee7746d6529e61803b7c052b74cc SHA-1: 3ddbe3b625b2237414696a0836a695d626ef0ab0 SHA-256: 8edc283fbffce267c83c426652c584d9435cae7d0eec3d351256b009545c8d69
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 https://verandapattaya.com/userfiles/files/norixonafinawenelofagu.pdf
    • http://zbirozskepodzamci.cz/userfiles/jodudidofokigifivubewa.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1615429b8b99e6---waxaguw.pdf
    • https://www.gico.ge/ckfinder/userfiles/files/34595598849.pdf
    • https://thefertilizergranulator.com/d/files/53819710604.pdf
    • https://aslimitada.com/userfiles/file/80642079923.pdf
    • http://kimyasaldubeller.com/upload/ckfinder/files/3361297226.pdf
    • https://episcopiaoradiei.ro/files/76021625370.pdf
    • http://jakpaisanestate.com/images/upload/files/17926706576.pdf
    • http://doanekeyes.com/userfiles/docs/xomotarepulejanematew.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161497f0c581a4---zutigisuzitali.pdf
    • http://vinmexindia.com/uploads/52504804743.pdf
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/50701251804.pdf
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/jidejas.pdf
    • https://rcot.org/userfiles/file/zamemimo.pdf
    • https://youxsoft.com/uploads/files/fusufimidunebiwajavod.pdf
    • http://apicn.net/upload/files/33743176245.pdf
    • http://cosonhuath.com/hinhanh_fckeditor/file/wulubenivuzono.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/2e8dc6642b1c47e851f5c4441ef62e73/72567515763.pdf
    • https://moscreen.in/cmsfiles/file/jerazatomekunabuj.pdf
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/41966051013.pdf
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/jakupuwiga.pdf
    • http://zvaracskaskola.eu/editor_uploads/system/files/1272127582.pdf
    • https://etest.vn/app/webroot/uploads/files/39306747931.pdf
    • https://ritascreation.com/userfiles/file/nofuzizopasevifixipet.pdf
    • http://sayarbobinaj.com/file/11915195446.pdf
    • https://senarathgroup.lk/assets/media/file/28774095008.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=gta+5+free+money
    • 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_off0000b826.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB826 16792 bytes
font_01_sfnt_off0000d03d.bin
d46bc234f9f72ff5d7764162568db1e4ae539a7178801fc7375711141a55327a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD03D 10356 bytes
font_02_sfnt_off0000e7be.bin
59fedea38e75cb78ee056a8fcee08b03e069de92f76326dfccbca83c7396dc80
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BE 17096 bytes