Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9506a56713997af…

MALICIOUS

PDF

89.1 KB Created: 2021-07-06 06:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5d8b7542c08efe7bccd420af31f6356 SHA-1: 171a2e1072710a64e93b3e12e5ba33ced36fab43 SHA-256: c9506a56713997af2907eebdf0624f28cead97da062870c212fd053a8b3e4c86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple links on potentially compromised CMS uploads suggests an attempt to obscure the true malicious destination.

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://asfalon.com/__files/file/79149503432.pdf
    • https://aluminiosarla.com/userfiles_arla/files/jiferikewanoxixipij.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/n7fjl56btcrbkfk4ug42ui2bsc/nilar.pdf
    • http://winkeleninzundert.nl/uploadimages/files/tasakuganoxepi.pdf
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/rifapifilugirewabiz.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1609414e601fe0---34011321661.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e129ca033f4287129677be729e2422bf/kogujaziruvuvexojivi.pdf
    • https://augsburger-dartliga.de/uploads/file/66000818264.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab08149971---jejenodebufipej.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca86e32c95---wusilazel.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/9a2dc5d0e7b30a3ab0b6a9e05cd0b3eb/42926343726.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3a0790737a---vogesefo.pdf
    • https://langumeistras.lt/i/File/36707617385.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3b1bbc5b0a---fakivuludesor.pdf
    • http://bertrandetgastineaudesigners.com/userfiles/file/sumanesadibu.pdf
    • https://transmar.biz/ckfinder/userfiles/files/24103186906.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/4565509804ae49cfdb42fa33e4178c4d/97643793442.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=introduction+to+high+energy+physics
    • 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_off0000fcc4.bin
f1d7e296e67cf553e3fb556ab70bf49c1ed1ab3d16aec974fbabadadf365f7e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC4 16340 bytes
font_01_sfnt_off00012713.bin
41067c5a01d5b9acc495273d2a7848338ef2fc9677ca9bbeaf7d96140edd8cdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12713 10748 bytes
font_02_sfnt_off00013f8f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F8F 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.