Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6167e97a487f731…

MALICIOUS

PDF

74.9 KB Created: 2021-06-29 13:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: cbcbeb37cfa5a23eddd675a16238f4cb SHA-1: 87dc29678bc900fb6fd8800ed62fe8ccd79352d3 SHA-256: c6167e97a487f7316556d23c771785025d656eee5f0efa25344eeb5ea7014746
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, as indicated by the 'Pdf.Phishing.Trojan' detection. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to distribute malicious content broadly.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6968

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://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f673c1e671---lorulezekoxinus.pdf In PDF document text
    • https://alakharia.com/public_html/userfiles/file/89435329341.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1139187964609ed77f55d4b.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/kv1kebcupsk3takljfrelg9d5j/xijofibevosokisirowotopi.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/dfb19e4ffe4f4036f56d85a2c10704de/wariwuzejelijutojewed.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/b07f1286daae1484ff4a1ed7a798a052/tatidu.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/8ccfed14a7ee50093a55fbde4118aba4/fubelolupakalenixabes.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/b193288f755a1934821ba265f96420fb/pupesiwesuvagov.pdfIn PDF document text
    • https://strechybenesov.cz/content/65402361791.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/93326174780.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/c22117e3b686e277840f936fa5a98131/57643196345.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/27713280466.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/vemekegemejunuza.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5af520cc02---57519521580.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/kematorep.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/aff72716c121ae0ad6ba0b75e1894160/37505365943.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/6b5cacf04ba3623879c0af2776568bc3/58599562407.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1ef107e8f07f498e83dc7d3fbd6fddcd/tijapikiwefu.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/kobujuguwoluk.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/68b71e14dea4059e43fc661409583fe3/tiwezorewegemul.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/977ec298e0bf1ca147764340dfdab2f4/somisifopod.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/f85fe987e2efb42449f9b83320694dd7/71976595053.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=crack+for+adobe+photoshop+2020PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF948 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001115f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115F 10980 bytes
SHA-256: 4575fbd05105db7923f8e108203bb2b15749ed6560edf61883d63cced38ccdb9