Malicious PDF — malware analysis report

Static analysis result for SHA-256 1258ba98fef3285d…

MALICIOUS

PDF

75.1 KB Created: 2021-09-20 16:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a08594b55afd30c9ab97cb01c7ff5dc7 SHA-1: 61073f4fd7535ef0923c234bc4755d17f3036897 SHA-256: 1258ba98fef3285d06c4c6d2d024dc30f539095a8a68ec3f53ecb7b6ba184833
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which are hosted on compromised CMS upload directories, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely intended to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://drafthe.ru/uplcv?utm_term=among+us+lockscreen+tutorial PDF link annotation
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16134e95729b48---tojanadovuzi.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/pexovukop.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/38f4a88ba8202e579fc2c10396d135c9/22083977160.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/44303791951.pdfIn PDF document text
    • https://seikai.jp/free_images/files/57300065800.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/34072377936.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/nuzuwa.pdfIn PDF document text
    • https://organicearthfiji.com/documents/file/19934317282.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/55406808221.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/motidamaxakigoxobokurozaw.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/94be1c584ade6d594b8a048ec18942cd/38696520804.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/wuzirubufotepepomifefoje.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/xagunegibumikekenamizifo.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/82877349278.pdfIn PDF document text
    • http://leprofit.ee/cmsfile/contentfiles/jujififulanatojafejolamus.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf27ee786a---32748728351.pdfIn PDF document text
    • http://demo-enriquemora.shopcloud.es/ckfinder/userfiles/files/82029624136.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/pigapurekusikopowesujafe.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/25032572377.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/49651425537.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/5705297548.pdfIn PDF document text
    • http://xinyuemu.net/assets/202109/files/20210920033841173265.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141381c9d8c9---28935187343.pdfIn PDF document text
    • http://xinchenfast.com/upload/file/42550725509.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16136847544f5d---pozogufodevesumubudes.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_off0000be66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE66 18236 bytes
SHA-256: e6040eeec2815277bc928cfbc143ec3fd4774b7a86963432de4f7373692dff9f
font_01_sfnt_off0000ed88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED88 10744 bytes
SHA-256: da41e4607778efd7d1c5ad776a9e6cc5d80dff24fd2035377771b4973a58bdf8
font_02_sfnt_off0001064f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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