Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c42e164af91397…

MALICIOUS

PDF

100.6 KB Created: 2021-07-01 19:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 768dd414bf9ff674775412e3432d8f29 SHA-1: 02f10d6e2d569a8696079e27710641f87d51d390 SHA-256: 95c42e164af91397b6106437ec63706c03ee6ed614b9cc2ec46fa8fb56870cf9
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised websites and disposable hosting, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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://ketchas.ru/uplcv?utm_term=photovoltaic+cell+technology
    • https://maintogelonline.info/contents//files/xagodewakelugadegenuloju.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607759e1b4fbd---kilewadunumimopisobiw.pdf
    • http://unsersohn.ch/images/file/bowitimoparidebi.pdf
    • http://goref.ru/files/file/54408719850.pdf
    • https://cornerstonelaw.eu/userfiles//file/sobukunituxofimogarexewa.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89d3487e9---96484358023.pdf
    • http://gesundezellen.de/neu/userfiles/file/6442987424.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/126b41f6e62e56238fd9af6a2e24dc6c/34700380749.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079529a2bbfc---22442936527.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/791acadc0a234e96cf99411c0f10b35d/2395372377.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779730ea042---filobosuwabatadojamuli.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/975fc2a19723735609ce027f30e893a8/74997299515.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/9669a938dd1995e7e3e6cd57859f05c9/zideja.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b35c53722b4---84802302302.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f8101c7db---77502731729.pdf
    • http://quick-thailand.com/images/uploads/file/91508655925.pdf
    • http://akcjonariusz.com/UserFiles/file/nikasomese.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b0801c74485---43493370573.pdf
    • http://ahlhy.com/uploads/file/011828241646.pdf
    • https://augsburger-dartliga.de/uploads/file/67483544665.pdf
    • http://tumwebthailand.com/ckfinder/userfiles/files/77128687932.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/amb8m0vbig3l3ip9mu1th65sn4/27219983440.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b74550985bc---27315596323.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c82e002ca---29270387963.pdf
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073fdc5a0619---87901395366.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/dd264f3361e368f905ae599d28e27c74/39312476740.pdf
    • 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_off000126b8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x126B8 16792 bytes
font_01_sfnt_off00013eca.bin
76bbbf277c130f9ef0de9d110515ff38aab3e02ce5f365238044087d9764c86f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECA 17688 bytes
font_02_sfnt_off00016d3a.bin
93f7688591dd715f11d21d73cbd0dd437f13527358a7e77fd45fd52ae1e49190
pdf-font-stream PDF embedded font (sfnt) at offset 0x16D3A 10420 bytes