Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce7ff1353517429…

MALICIOUS

PDF

85.5 KB Created: 2021-06-30 02:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6287b4b1a185563f2b8b091d34b42ec1 SHA-1: 9f84eb79ebbda7ddd0e67dc27edd20821392870f SHA-256: fce7ff1353517429d2cacc253b1cddf43660f71a64e0899acf0ad673c2212fe7
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/d69gejm35lom8vpf1qgldsvns8/jixepesoxabuvonoresena.pdf
    • http://bulk-supplies.com/userfiles/file/74999593747.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/150817024e1ba2f17edd4c5176e42596/27792084466.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/pcs49vpd9s7bo27ujqqk4lji41/jodezuzudosumasewib.pdf
    • https://uleiuri.ro/userfiles/file/jafuridawivow.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b290bc39bab---rupurakiwekovofog.pdf
    • http://tuzvedo.hu/elemek/file/zijusurixo.pdf
    • http://cwesp.biz/upload/file/togijakuvi.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/d6f46df9233d05c34a053badda0b0c6c/sofaket.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606feff4e2c49---fovanejuwelesixibenitila.pdf
    • http://agrobud.net/uploaded/file/mafuzinijabesitemebap.pdf
    • https://drvishweshwari.in/userfiles/file/xadosikedizuwesevaj.pdf
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/79800964430.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be226f07eda---vogidabisum.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1fa4adf38---nutafaf.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/1o6eg4bcpjluu9ab4i524s7q1h/bexer.pdf
    • http://htwy.com/upload/file/goxid.pdf
    • https://autoteam.in/ckfinder/userfiles/files/39703992831.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9538395c7---15985486800.pdf
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/710837e4703f0ff088b288722ff8c165/wesuvonotuxelalidojenewon.pdf
    • http://dragonera.cn/admin/userfiles/file/supexibelivilakekusu.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/631953660c76c37fef7fecac5b6a4002/15742587000.pdf
    • https://paperland.bg/uploads/file/nuwadogewawulamodozina.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812fb5a0869---70382018959.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=free+enterprise+system+definition+us+history
    • 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_off0000eb2c.bin
061931382e7100582a2591a09098110ed58192afa5526e3c2e274e5e36443823
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2C 10744 bytes
font_01_sfnt_off000103ac.bin
d4feeb22f121ef7560dbd0be58e2f298bfbe3f5c65b5ba87421dbc76c5cae27f
pdf-font-stream PDF embedded font (sfnt) at offset 0x103AC 16628 bytes
font_02_sfnt_off00012eb7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB7 16792 bytes