Malicious PDF — malware analysis report

Static analysis result for SHA-256 6501bfcf9d2bc0cc…

MALICIOUS

PDF

79.0 KB Created: 2021-09-08 06:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 38a7cd9e31b7b951dd84139625e8c244 SHA-1: 84a923ed4f845b0e3be73073bae6b882e666274d SHA-256: 6501bfcf9d2bc0cc53f3f83c563e17e6ff50db79e76769d15ba606a16f656897
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to potentially compromised websites, some of which are hosted on CMS upload directories. The primary purpose appears to be directing users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5252

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.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/ga1193f16nc5q8kk8b6paitc2c/50820225849.pdf In PDF document text
    • http://poltinik.ru/userfiles/file/2696575026.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/9amoc5qopcrj5smcv84k3fdael/lelefujivajedupoxot.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202106060249408749.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/zakovufe.pdfIn PDF document text
    • https://nwdglobal.com/ckfinder/userfiles/files/3013618020.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3f64bb218---98528088900.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/r66hb5bnahehhtjjsdt7bp0bif/70814483012.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077c8fd5de31---12333847499.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/8019868939.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/8148546445.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/70356723261.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/c93abeb68a67595745109f5d95acc12f/25015141078.pdfIn PDF document text
    • http://hejia-ele.net/upload/8496232484.pdfIn PDF document text
    • http://abnicum.com/files/file/wuwujaruzipodesozetov.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608d81c487c59---sewimeneruzazakonanu.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/75537323546.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/55903265947.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/96644679310.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/zafusutorikufu.pdfIn PDF document text
    • http://lulanjina.net/upload/files/59396805620.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202108171211538635.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=cinema+paradiso+piano+sheet+music+pdfPDF 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_off0000e675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE675 10972 bytes
SHA-256: a86616fbf5955054c848c6e93d3df48f6903717e33e40e91d78b54fb4c6b7608
font_01_sfnt_off0000ffb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB5 18400 bytes
SHA-256: c6eb9c7749f158a14ae65dfe79891ea4ce02465033fa349a44b36c39058cd521