Malicious PDF — malware analysis report

Static analysis result for SHA-256 7283dd0dd94035ae…

MALICIOUS

PDF

90.0 KB Created: 2021-08-18 18:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96036d72ce1f5215dffebb34bb353560 SHA-1: 7e809403c5f6e7ffeaab98a44a7ed05d0dac46b8 SHA-256: 7283dd0dd94035aec464b11cb899095e121f530d77bbfeb4dcca34c4ab37766c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a link farm pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The primary attack vector appears to be a spearphishing attachment, with the PDF acting as a lure to compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

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://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86891f2455---rogitomikagefibevojuk.pdf
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/e13e2ec0fe62503cd5deec1dc6c3d0b9/vozezopirijiziruk.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ece68ed77b---17386000724.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5e198e07368b2b7c80283c830eb935ee/zupunetexus.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607074d47615e---nikuvixesodudolamig.pdf
    • http://constantemails.com/userfiles/file/1625255215fatenexu.pdf
    • http://leinerpakgelatine.com/survey/userfiles/files/76900071504.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7088b681e---nizamoluledutesu.pdf
    • https://textosolutionslinguistiques.ca/upload/editor/file/dekexik.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607201e9b6693---21144750940.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cb53584c0---jolenefisonakivobokoz.pdf
    • http://westernmaki.com/uploads/files/7677644072.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/aac679181a581cc94c48013f809488a0/58382480494.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b09c7b1bc---50334753945.pdf
    • http://kaizousha.com/js/upload/files/maradogupogelasosukode.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836eca7f319---36350536998.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/f9318f7fe2959a34400ee99e244fa192/99473710018.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d177fca849---dosivub.pdf
    • http://uktohabbarijamalta.com/files/file/vawedisiretojado.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6d3daa72a7---57158154775.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a9f570dc3---32808281061.pdf
    • https://cargoservice.pl/cargoservice/userfiles/file/vagesoxo.pdf
    • http://wojno-stal.pl/pliki/file/13994347892.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=ver+the+carrie+diaries+online+espa%C3%B1ol
    • 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_off00010730.bin
7e461f34533a4651398aa2c8053d1c91e9466de1a8a1f33580ed2d4e0e9f1751
pdf-font-stream PDF embedded font (sfnt) at offset 0x10730 10784 bytes
font_01_sfnt_off00011fb1.bin
f97dba978eb9d3b543938c5ed84f2077192b1f3377fe17ed061392c78ff2ee25
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB1 20468 bytes
font_02_sfnt_off000153db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x153DB 16792 bytes