Malicious PDF — malware analysis report

Static analysis result for SHA-256 49351ad74ee1d721…

MALICIOUS

PDF

85.7 KB Created: 2021-07-13 21:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 02f32964577c6458c0916417c211cb4d SHA-1: 1f53bf7dca8280964449088cc807c2045c30b61a SHA-256: 49351ad74ee1d7218200f99ea63bc098abe96e9c3c59d1cc0c850e836b2963af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of a link farm and the overall detection profile strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=how+to+merge+word+and+excel+files+into+pdf PDF link annotation
    • http://golden-candies.ru/webroot/files/files/dekovovudijopojibawe.pdfIn PDF document text
    • http://charivne.info/images/file/nosovi.pdfIn PDF document text
    • http://slsnn.ru/content/file/xugejusa.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/7843331170.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/mctf83nncaoiaf07b0996ko8m0/sefus.pdfIn PDF document text
    • http://93564497.com/userfiles/81013556939.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/81fecda6e166b44bb383644075297ae3/16029425347.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d2cd3ecb7---96280876003.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095b09083aab---tadozelogedo.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/f226522e4c44240e77350f084f590c4a/45103515692.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/58534932939.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/17ff4f7fa7c73a67cc021d2bb93f8da6/70217986373.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/rb2o86l6osoumnrdvgk10vr1l3/toboranafawafofotokepawug.pdfIn PDF document text
    • http://europartner2.pl/uploads/84873240835.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/78c8ecb1f9043ae9b62fa830c76d70f7/7667545573.pdfIn PDF document text
    • http://emeat.ru/var/files/sowemu.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3f5b715ef---64803675737.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093cf72cf583---motoretetovolanabelis.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160962230e0a2b---64404536810.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/xawowunupotefijosezojeg.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/04be3662c3ed0042b9701f91336db061/filufep.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff9dba2797---nukeluv.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/pirijutudeju.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/b6370d8a236a715fb109d7bd9138ad2f/zudipolojisivuwenedoxiw.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8eaa0c6f57---rififobejatunudesemipil.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_off0000ea30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10242 17212 bytes
SHA-256: cf077c475b4d61a9c78f5511fb96a9034ca88c08645d91c6bb047a1f414998b1
font_02_sfnt_off00012f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F62 11144 bytes
SHA-256: a989d5320d70b4702d2743c90bda223089cf726d3cbf1b8e71069749759551d3

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