Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b58d19f15e0e9ef…

MALICIOUS

PDF

80.0 KB Created: 2021-07-26 17:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ac345a2cbb554579627b7109b9e28c47 SHA-1: ff10c2f782caca5f0152ea2398554996a7844013 SHA-256: 9b58d19f15e0e9eff7cee9ca40a772d0b660870b44dc66210c3530f051d17016
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6958

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/0bd09e7e9a7326fd97034e313c074f03/13514138618.pdf In PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/vqi7u6ta837a7r89am9qcfli3v/gugepadoxoluguk.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b58ca1c0d---banivegofatabof.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/fujofe.pdfIn PDF document text
    • https://codecs.roimages/file/bakaxoguzajujabunixa.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/newefaruk.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/hfsh7ldm6ocphj73mrk3864mb6/jezasizelanotosezedexide.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dafbc5e3c---54529876236.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/tatagika.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607542ff56e0a---33249921502.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608745df2edc9---82067936317.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/kuvodaxasakaraperim.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/67294011060.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/jefafulafinenaviwur.pdfIn PDF document text
    • https://0900107678.com/upload/file/85457255735.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/r273gskg3n4u5gcgtvbc3sbb63/27059168184.pdfIn PDF document text
    • http://rjt1.org/upload/files/ligukovimamumareso.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160913f8481dce---2330158762.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/pkvg406pg074v6vv5s0huaghkd/87844133535.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad067fe042e---vajipoxota.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/2a583708dedeac51bc9e87aaa10d00ff/lesurutisatefuxeganaj.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/77965090041.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=download+famous+urdu+novels+pdfPDF link annotation
    • 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_off0000e7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBE 17196 bytes
SHA-256: 08e95f1da7192f5910e9b314e5553f490c08c126d02a0309f4b34dabb6df6fa5
font_02_sfnt_off00012c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C72 10720 bytes
SHA-256: 0471c96fe6f7cfbd3051570ad1f55e96455c6cfc4019b833481b47b32ac8234c