Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8a079ebcceb364…

MALICIOUS

PDF

95.2 KB Created: 2021-09-08 10:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 77e1c5d03e6b99920853097e94e146ca SHA-1: 76ef681f70ce05132f8e81f848afb936ceeadac7 SHA-256: 6f8a079ebcceb36410a08cc9d6388036a95d473b93b0a29dc11ef14506d1e2d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content or phishing pages. No scripts were extracted, but the presence of numerous external URIs indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://pistant.ru/uplcv?utm_term=justification+by+faith+in+romans+pdf PDF link annotation
    • http://goldenpeak.it/userfiles/files/8198709122.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3070bd4621---dolebivilumeboxewepiva.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/d2dalh05nnmlhictrioes80ijk/77168284219.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/vowopifaribifujimeroran.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/mjujf2n37bg8c9l4lavaui7o6b/82314999915.pdfIn PDF document text
    • https://mabuksusu.com/contents//files/70126386106.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160968d4080580---tebovebiwaxomiw.pdfIn PDF document text
    • http://tootingtaxi.com/survey/userfiles/files/gagekobivebup.pdfIn PDF document text
    • http://allycatering.com/userfiles/46775907876.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/652diohac0cbiog29f8h4llta1/7614018915.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/328d076d8bc589a60c3f12cc510cd9bc/57023966222.pdfIn PDF document text
    • http://xn--l3chcucnqd9c0eua7b1k.com/user_img/files/jajoban.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/ecc763d3a9b53053d97a757808d172c8/67529232175.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/61794738840.pdfIn PDF document text
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/xopuxe.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/70720138404.pdfIn PDF document text
    • http://top-caster.com/userfiles/file/71231389445.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/67009476849.pdfIn PDF document text
    • https://arrad.ch/modules/ck/ckfinder/userfiles/files/nusozijubekaxaza.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/10717663431.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/juwemud.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/darejo.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160872f33aa965---milekedazifupimiwite.pdfIn PDF document text
    • http://u15.ch/ckfinder/userfiles/files/mumisuwavenedizapume.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 22868 bytes
SHA-256: ea930db2d472ed1d4c1a0cd02efbad8ebd70b8db93efc6d34237e316063ae3aa
font_01_sfnt_off00013d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000155af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155AF 11052 bytes
SHA-256: 5d10748c7035a0cce32ec5668f961c2ca5f8f44b14ebe94c094bf6a9158afcc5

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