Malicious PDF — malware analysis report

Static analysis result for SHA-256 da6a70a0334227f3…

MALICIOUS

PDF

84.1 KB Created: 2021-07-02 15:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3cf161ae362effd9422dea66caab5b96 SHA-1: d6ee57eef33db1118c463ea68a2d6919e924e90a SHA-256: da6a70a0334227f33ed70086edeb2ae7b5b0feb0abeca907794c0085a611a1b7
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites and are hosted on disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery via these external links. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ddb90b7c02d---32916568127.pdf
    • http://networkinglikepro.com/ckfinder/userfiles/files/5162435301.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160761fe6cf69c---24720391948.pdf
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/800c0fe67aba16b149385e152942c50d/dolemupemokawoxigatakutut.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2121ed03dd---18950499464.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160abdd6607107---3661979256.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/10gn2k761j96i9b0f8o3pks6b6/80409168256.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6d98f0e36---jilozegasejof.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e6e664d9a---gemikulasaminulo.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/10j8md3bv5edggjhnj14pq64l2/80023455177.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb3b7ab26b---firuvepawisod.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16083e20ef41a3---sekuregalemuvudozorabap.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8264ccae3e---31723592879.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7b1954b12---6284474172.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/19kje5129r2omjr9upl2ekmet3/sakajumusebirisode.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cd9d9aba694---begof.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/c1b1f76d80b82a0d20be2fe7299d7f0f/35310805713.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af95b09df0---nikodorafotukexiruvidorat.pdf
    • https://hyosungulf.com/uploads/file/gagofa.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/dezinupunugonevodi.pdf
    • http://currycornersugarland.com/admin/images/file/4396124950.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/e29240f2b4e8c84ca7fafcdae77c6b3c/werupofinowofimozegujew.pdf
    • https://www.khanacademy.orgEspecially
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=old+age+homes+in+birchleigh
    • 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_off0000e4bb.bin
2229e25998a70de3a413fcadd2a404b205a1270c5158d645c74ccf7aebcc2b34
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BB 17556 bytes
font_01_sfnt_off0001127c.bin
f92201a1f6e2ef7b4475d6e46018a2b91d0e8415d88de221c008f5b611bf7b1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1127C 10884 bytes
font_02_sfnt_off00012b32.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B32 16792 bytes