Malicious PDF — malware analysis report

Static analysis result for SHA-256 9706f1503a1e80d7…

MALICIOUS

PDF

89.7 KB Created: 2021-07-04 13:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9cdff9d292c7b92a41fd93760b9a702c SHA-1: bdf733f079f3a5b930311bb1eff6475bd0852e22 SHA-256: 9706f1503a1e80d7dbad9db898a11173425ae47be666f4dd24a12ac87a345c35
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs hosted on compromised WordPress sites, suggesting an attempt to distribute phishing content or malware. The presence of embedded JavaScript, though not directly executable in this PDF context, indicates a potential for more complex malicious behavior if the document were to be rendered or processed in a way that executes scripts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6c5b97445---81327797846.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/b2b4b5f4e5041268ad684ab4c1174993/86730791858.pdf
    • http://allprintusa.com/admin/images/file/ruzum.pdf
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24e8c56162---jutaxu.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/32736f5c22714b22634d45723b3d6ced/41669134775.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099f8d8cf69f---28568759160.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/fqphls59hm83mfdcod5tlrdsru/90115141483.pdf
    • http://glina-master.ru/admin/ckfinder/userfiles/files/xikojusepolese.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3416ca121---25815497248.pdf
    • http://am-assets.com/aom/magnolia/userfiles/file/vimumu.pdf
    • http://anthonyvienna.com/sites/default/files/file/67605683817.pdf
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/roderavavupugegisu.pdf
    • http://driver-jazda.pl/upload/file/xivoxujufomepepexor.pdf
    • https://egf.tw/test2/images/file/63771207642.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a385863c287---1128911264.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160723558c957e---zajajoguw.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/j80q5krc9b6mf93m603lt0ebi7/58980547399.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb9c116552---jafedatex.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a733ae5c1f2---36680223432.pdf
    • http://whscardinals1963.com/clients/9/9e/9e5fab02d16e7113a74bdd4e7828f974/File/75295515801.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a883cb6a996---jumifaxajutumibu.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afa3f9bd052---nixineserafemezagivozonig.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/s078bb8fc379riospk8i1hbis2/8883643518.pdf
    • http://www.thaiboat.net/image/upload/File/35813128238.pdf
    • http://donateagift.eu/userfiles/file/73097945437.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=fishing+in+the+bahamas
    • 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_off0000fa8f.bin
db8d8339a1e5dcbe5c700311c6fd90538f7e7841998eee6b0b235e22e6dc930c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8F 17760 bytes
font_01_sfnt_off000128f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128F9 16792 bytes
font_02_sfnt_off00014110.bin
58f332f7e43c772bb1a155f86ed22684ed7fb4641631b0b34462a47f8f684794		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14110 10404 bytes

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