Malicious PDF — malware analysis report

Static analysis result for SHA-256 187eeca09749584e…

MALICIOUS

PDF

79.5 KB Created: 2021-09-02 12:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9fd753e16f494c69ba75118a79042d39 SHA-1: 0b44b06e29204d220b3ba1823092032e01c38fe0 SHA-256: 187eeca09749584eef7fc20a35a4e010fc0398c382e508df3c90065a4c533371
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://assisdrive.pt/userfiles/file/fipib.pdf In PDF document text
    • http://go-forum.cn/upload/files/wixanetoxawevafuxupoxu.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160775e67f2906---fepidefoxunosevok.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4d7a4386c---gifoxagariteva.pdfIn PDF document text
    • https://a5productions.com/home/a5pro/public_html/ckfinder/userfiles/files/26979673471.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/tinaturan.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/98267488500.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/xizasubevodate.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/151e22eb25aee380e57d34e63683443a/paxidonutora.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/ramepufunajagewo.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/nifovorodovijanajopup.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/7deee56a988f19a2c3f4da382c1a3a6a/rewasujodib.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/a5b2tq5io3ku360f98a75u3b69/4380938739.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210618165843_9lnsje.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/d8d0c8ec73e496e6129cdf77f42e7a92/xituvolalokomu.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706615cd3a4---80953276431.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4d327ffae---xevilarevuvobute.pdfIn PDF document text
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/29405052824.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/epn04b6i742if68f3en2s9mpg1/59400465670.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/74522681951.pdfIn PDF document text
    • https://soechi.com/userfiles/file/gebiwoxosatisilud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=cardinal+and+ordinal+numbers+chart+pdfPDF 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_off0000c95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE172 11156 bytes
SHA-256: a9e89a73bb2500e3114ce7f7e9be90a743f4f06208fb284c200f6e242ad2cdd1
font_02_sfnt_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 20172 bytes
SHA-256: 492bc47e075a6016a3502e5fe181e6a632faa8a128fa6c8f424c7ed60196b329

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