Malicious PDF — malware analysis report

Static analysis result for SHA-256 f928499625183d60…

MALICIOUS

PDF

74.4 KB Created: 2021-06-18 06:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4c8f4e95f34888ad668aa57904e0da4d SHA-1: a5e9e99a87ef4bafb260e21642f0e529812b889c SHA-256: f928499625183d605141de1a9a03604bfdae74ddeafe84959b852725a3d7cd50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised CMS upload directories, suggesting it functions as a link farm. The presence of 'utm_term' in URLs further supports a phishing or SEO manipulation motive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pixomot.ru/uplcv?utm_term=jamie+dornan+hair PDF link annotation
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/pmoqgl7e92bniutimodlfv5io0/kokupibowej.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077136863ea6---wipojolorumulujisedefede.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be89864aca6---welibulubesojopef.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/60433132759.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/24d6dd596bc4a1e80e72cf995a3a9269/72413129059.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/28948289912.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/71988090521.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/mukki09hpugn3a9dsnoil6juum/bovawidi.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b93ca09e389---26299661864.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5c58ee3a2---80239730987.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be43120deb5---19323128020.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/wasirefezopinigododat.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a86b37c04---gajefuxiravikukuxowafin.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/muzemo.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/4025299404.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/perugesafon.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/lakofimamene.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A1 4844 bytes
SHA-256: 9a366c71f562244fa7aa11e251f96df8f8bd67889923a75f61e2a3caf513ce57
font_01_sfnt_off0000f4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EA 11752 bytes
SHA-256: 6c0f47b50ee64b79b900ae15dc4680dcbc7e36ea5dacf299375e8c70e5be3486