Malicious PDF — malware analysis report

Static analysis result for SHA-256 06faf4936f77931f…

MALICIOUS

PDF

83.6 KB Created: 2021-06-26 16:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aed573d576530ca75ed8e284b538bdf4 SHA-1: 77f011b3d7ba02500a297c2dd0e6b58d47439d78 SHA-256: 06faf4936f77931f964570565ac23fb88da78c0ad862e17f86eecebd36ffa918
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it's designed to host or redirect to malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malware distribution attempt.

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 https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/cd76f0643a00c255cf996798c8552133/37517466403.pdf
    • http://spy-military-labs.com/userfiles/file/mapasanininoju.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdecde930e---13836954858.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/9e4ffff69f4fe8fcdd81e1f33b6a49cd/fepobugasikideligobim.pdf
    • http://ithaca1961.com/clients/875375/File/fexowevuxodiseluz.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160941ebb7d927---18524059592.pdf
    • http://bellina.pl/userfiles/file/widejuvumazesivi.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c5514dc3610---99941981897.pdf
    • http://matstravel.ru/userfiles/file/sapazuzesitazus.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a4adc91cc6f---70753524783.pdf
    • https://vestol.bg/files/file/50590544688.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851a360c27a---43185985671.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/8fupc0tamddaje1emot843eqcg/46566657540.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/9cfb47d91ed09491ce2824c2d7fb1c8a/tovetiz.pdf
    • https://davaocarrental.com/images/file/41841875539.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/f2346e449af91a049863877bfeffee0a/sovewufinatimofij.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160750c0f14a6f---kurexubejiwe.pdf
    • http://bluenanum.com/ckupload/files/bafazol.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/k2uh4vno7mskm3g8dg7jsnqilv/22878569566.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/mg02if3mvipp1fvlbo2k8hguco/8821851352.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b648202085b---dekamafuwosewuporajovufa.pdf
    • https://fultoys.com/userfiles/buparuriberilire.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=classical+school+of+criminology+examples
    • 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_off0000e571.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE571 16792 bytes
font_01_sfnt_off0000fd88.bin
a73212c9294db504206659b498490164b8bbcd53272a555decd8321e64e04854
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD88 11076 bytes
font_02_sfnt_off00011731.bin
6308d90db40c496dc654e6b54dd3c07e61abac7b02bd8e06686fde285d7de384
pdf-font-stream PDF embedded font (sfnt) at offset 0x11731 16304 bytes