Malicious PDF — malware analysis report

Static analysis result for SHA-256 3012ce47bb21ddb1…

MALICIOUS

PDF

80.8 KB Created: 2021-09-08 23:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a2cde4219e00961f3006960042cc5cb7 SHA-1: d40cc60ec1e3b002f8a51aaebf44b69c0341acce SHA-256: 3012ce47bb21ddb1097bd015b9f8336482367a606fd5c758bf30222f4c64778d
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure suggests an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zelodibevupakoxoju.pdf In PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f08eea05ab---siparasagokogujidupak.pdfIn PDF document text
    • http://millionsdiscount.com/mo_images/files/65096146035.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/59066934782.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613270aabc2bb---69078845733.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/47666414081.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f530e299e2---81077521732.pdfIn PDF document text
    • http://geasit.it/userfiles/files/diwosululudu.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/10836354580.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/64097325603.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/zebof.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/5b3f537b88b5466b82d8ecf2a9d01317/9302805592.pdfIn PDF document text
    • https://enilubricantvn.hoakhanh.vn/uploads/image/files/nujulajuw.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/3e4e90444cfadbdf5607fbe6826a92c7/popinulerukamaleje.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/vixerisaziwirek.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/44429390402.pdfIn PDF document text
    • https://ski-valloire.com/ckfinder/userfiles/files/kazunogopomon.pdfIn PDF document text
    • http://www.flamanville-76.fr/upload/file/28815337268.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/11548296947.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/93057010076.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/sufibevof.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/4047028764.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/guxovenurigar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=cruella+online+free+moviePDF link annotation
    • 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_off0000d9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BA 10308 bytes
SHA-256: 86e182ffab21a7194fc4d3be9acf589e3260e0f841cd8d9782450c23b0b26ff3
font_02_sfnt_off000108ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EC 17480 bytes
SHA-256: 4875e5b3498b6a500d9eae24126b2057e8fc2dbf954936b6d8d0c7756322d441