Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f139dbccc89676…

MALICIOUS

PDF

92.9 KB Created: 2021-06-30 20:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 498991823e54e979e0076de4c5f164b2 SHA-1: 04134768baea80e3d2c9c51766852e659db7cf09 SHA-256: 36f139dbccc89676111ef3ee1ba1c213215be91dc01e59013a6fc223a5c3b4c0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as Pdf.Phishing.Trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites. These links are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4575

Heuristics 5

  • 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
  • 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://crewmak.ru/uplcv?utm_term=cranach+allegory+of+law+and+grace PDF link annotation
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/5tmn0nhokk2qkqjto6n2qio0h7/66360713344.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/d2nuqr1p01jknau56fh5rmfma0/9525130689.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/nafeboxorure.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871b843f3dc---tepigugulitanoti.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/sawuku.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160ab60b9b39a1---wijuruworudosukiwuvil.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4245c7f45f---kudimirime.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a99304b468e---16258559989.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/jokubefid.pdfIn PDF document text
    • https://aneri12.cz/res/file/fukepekebenotarifa.pdfIn PDF document text
    • http://hncastlecable.com/d/files/10498283928.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607eabf0dae44---vobusipizonubedagi.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d545bcd3e54---37676805621.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/39339611787.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/niwobadim.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/00c45f76b39292b7f7c122caa33bae93/gewejujigebanatomutirize.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11892832821.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/bojusotosixegawerenidexe.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/33277991572.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606d33e952253---47606945418.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/3ca075ec5c11449aa97ccef1ffc3ae45/lezufokulogitekenewitov.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/e9f0ed5e50bf786e0265383ecc4cc876/lowukumog.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1B 18652 bytes
SHA-256: bda8764ed11e7a3d47b44e3015df927b33d258bbe877a45b5d45120d9ac97386
font_01_sfnt_off00014ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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