Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba8e191c614d6f7…

MALICIOUS

PDF

94.1 KB Created: 2021-07-05 14:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 08bd4fd8965191d00b8ca41f0f573a0f SHA-1: 674088d21481f7219416666c1a91d304ae406809 SHA-256: cba8e191c614d6f70e4c81cd42cd4dd73a4758d7702b99450a053d57c0f3eeff
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to deceive users with fake lottery or parcel delivery schemes. The presence of numerous external links, many pointing to compromised CMS upload directories or disposable hosting, further supports this. Although no scripts were explicitly extracted, the PDF structure and the ML classifier's high confidence suggest malicious intent, likely involving redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://dh-life.com/ckfinder/userfiles/files/divugigatafetuj.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/db4c3618abc0395d91426e5cd71e0a5f/xusofusixeminugilikimu.pdf
    • http://agcslohian.com/userfiles/file/2402831977.pdf
    • http://nextgt.eu/uploads/file/basuligegeb.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/4f3ef2ad94de14c955c77b99a9d15b26/denifozusatamuxarikeju.pdf
    • http://drapikowski.pl/uploaded/fck_files/file/xiwewedowomigikawuketonam.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/1521ee16b35071a1695bed358c87ae00/57136269217.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5e0469a8a---jopavuzomiluw.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/54d6ef0d1f74f71f45cde512606a5d22/pezobitegupigawojisunoweb.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/fakujotonasefesalif.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/ca6d73c46459043331e3265899b15a1b/37568815018.pdf
    • https://manuscripthandler.com/userfiles/file/47353664654.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a13e96851a9---47867437331.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607938c20c48b---18370196642.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/g924lucjcp392m8lkbid6v3mao/86352432957.pdf
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/27144665017.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdd983d4bc---vureju.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/lftags3tmel7mkskbgbhqfk5kr/wuwesawif.pdf
    • http://piotrkowska77.pl/zdjeciafile/94803801761.pdf
    • https://luyenthitoeic.info/userfiles/file/jekusatirus.pdf
    • http://narcisse.sk/editor_uploads/files/52023969512.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878b89e3176---suretinejipojaliton.pdf
    • http://luvnchrlysenglishtoys.com/clients/861429/File/xufexavumipala.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d978e990839---zubimubipev.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160935cdac1b45---88970735294.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=joey+tomatoes+clements+ferry
    • 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_off000108cb.bin
9f45c5aca52a03fd6250e1c3dff009b0307bbbac3ac63e13b0739b99f1137a62
pdf-font-stream PDF embedded font (sfnt) at offset 0x108CB 19036 bytes
font_01_sfnt_off00013ae2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE2 16792 bytes
font_02_sfnt_off000152f9.bin
b2ca247dd5d04f9f3565ece580b626601e8ac2d8c667f3802bef0a93a87762cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x152F9 10508 bytes