Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34e762dd5edec8e…

MALICIOUS

PDF

72.4 KB Created: 2021-06-25 16:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dda5ac4a0d04c1eab4a776747cd4cd08 SHA-1: 6abf90c0a860d4a5fa996fb7d6262d2d4fb0e323 SHA-256: c34e762dd5edec8ed326f5f1e60b2fdf1fea112ff221a5062fd26ef75482c98c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs that point to compromised WordPress sites. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc417423eb---83318718843.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/f6644583c54d1d331652e903110a46e2/74144566949.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/cjlmsm48hk0ql5vtgfnuen8vic/vamekonelezaj.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794c505fcda---77766844333.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5114c0b76---nukoduzexivibanebezubexo.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/f34d84d4753bc0182b161be600f23b86/fawefugerosafu.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1606d680e04a08---22778016696.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/88712c8f280bdd133630da5907a226dd/fajexedafovitus.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/l2te7fvj5linjctb03igp4ksnh/gekafematowonozokotatak.pdf
    • http://zaun-produzent.de/userfiles/file/palarivizebowe.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e55ddff7a---memejowapizofuwoz.pdf
    • http://hiro-seiko.com/upload/files/84868155673.pdf
    • http://omni-links.com/images/blog//file/44962781800.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc130c941e---92857149441.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77b258e253---viboleforoparawonis.pdf
    • https://fa-vietnam.com/webroot/img/files/tororofi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=onion+root+tip+mitosis+lab
    • 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_off0000bc7a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC7A 16792 bytes
font_01_sfnt_off0000d48c.bin
36165191bad2fdde1a491e23f1537800ddf1f0155a86c371225c8daaa1d65786		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD48C 15896 bytes
font_02_sfnt_off0000fd7a.bin
6687390139fbf2847753d393f3603154f1234c907875d11a0e49e5cae03a8474		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 10448 bytes

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