Malicious PDF — malware analysis report

Static analysis result for SHA-256 0866e7790346f692…

MALICIOUS

PDF

85.4 KB Created: 2021-09-06 08:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7e63b3c742e07cb425e067a830abb9a4 SHA-1: a9938f65871ab91b6aff9f5342049601e66c183f SHA-256: 0866e7790346f692d4d1fc813782d214ba802a5577eee1a24a87787fcbf8be7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm heuristics, indicating it is designed to redirect users to external sites. Several of these URLs point to compromised WordPress installations or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://wastran.ru/uplcv?utm_term=redragon+keyboard+s101+manual PDF link annotation
    • http://cinebuzz.be/uploads/userfiles/files/xuwuwitapofug.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a26d12d90e5---jonokixogarojosunutinalab.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/buzazusipedolut.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/wolaroguxudamosif.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/89513592292.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/laregowusuwadab.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/kenipuwixa.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/e011a54b226bd1e22608f52627518978/lepoxiloju.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/sasuwuroviduw.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b51e9e17d51---gobakupubopotugiganop.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/25896644685.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/17704118109.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21bff7c9a3---turofuxuf.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/4jjkcnm6005jo98iatmviibrf2/tonod.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611c1beadedfa---xovekumugukevuvox.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/ff66b39ff37d9cd624f5d0d213178751/vorof.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/gelilomusuvutudade.pdfIn PDF document text
    • http://sutphinsgermanshepherds.com/clients/21958/File/80558653017.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/cj1oq8sdf0osk5sha96rc1j3v3/zoregikisimolunuzofifol.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/tupumoxo.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/senukivakajepujigerodolu.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/a40da765a2538ce11f521186fde86bca/paliwiguvimogufigux.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795c59d1a12---vipubajunamekuzikaweji.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/5400700427.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/texuzeragimowebod.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_off0000e5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E9 18488 bytes
SHA-256: 7b609ebf75886e9bbee05b09ef7239fda4dab2f5ad645d055c0add22e2327292
font_01_sfnt_off0001162e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162E 11064 bytes
SHA-256: 45d89bd048bc20d68064057ebd2cc2e80a59a1775c91ff455d29601e1c0e6405
font_02_sfnt_off00012fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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