Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb7677348a9432d…

MALICIOUS

PDF

102.9 KB Created: 2021-06-25 12:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc983f5b38a399edaaff1a70c41479d0 SHA-1: bfd718a4c460af9212e220f672d13decc0b27b64 SHA-256: deb7677348a9432d2ed17ec63250dcbd813d739287e56b931d607db30708371d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristic strongly suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e350956705---zarujafasifakivoku.pdf
    • http://clubmaniacr.com/campannas/file/wasemobelebilider.pdf
    • http://1utilaje.ro/mm/file/wawilarebujuvuwapiwumaw.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5093cd169---tewinonebazatogofabojok.pdf
    • http://maychamsocda.vn/images/userfiles/file/butoxosegipanitozaziwet.pdf
    • https://canevastoilestjean.com/upload/editor/file/35001790122.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/451aa34baafc1f316299dc45bb57bad4/47502247721.pdf
    • http://shosholoza.de/file/62584302634.pdf
    • http://polymer-optix.de/userfiles/file/29520357920.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d8b68ea6d---jibavuraluvu.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c245a3438d9---filuruwosifalemarefida.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a11f6ce5b6f---vitujaxutavagoxovema.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/9d0ba6e77b317f72bc6390273a2428b8/53694873354.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16082ca71d6d10---64946880722.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/a08b871a2bf250ba198b341f34887b64/wigitiwajusawipoxuboj.pdf
    • https://quangcaowebsite.vn/uploads/files/69339263285.pdf
    • https://signika.pl/Upload/file/67804680416.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=is+dhgate+a+reliable+company
    • 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_off000130cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130CB 16792 bytes
font_01_sfnt_off000148e2.bin
dc1395a97e28a059541ed49a447d56fc5ab05b82b0ba7648dc519c55912d6cda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148E2 11168 bytes
font_02_sfnt_off00016258.bin
88dde387711617dd9db36fe290815b2fdc1017dc75cffdfb29c4b3cc6ceb69a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16258 17156 bytes

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