Malicious PDF — malware analysis report

Static analysis result for SHA-256 d972052d95c8cb3f…

MALICIOUS

PDF

69.3 KB Created: 2021-06-17 17:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0c8bbd32b6fb9c5728b843a4e17c8c3 SHA-1: 887c37386695aff3fae1d8448560071b0be21f3c SHA-256: d972052d95c8cb3f755b9c60c425367e3afb8d230e919cc6def9a6e583bc4812
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various compromised websites and potentially malicious PDF files hosted on disposable domains. The presence of embedded URLs and the heuristic firings suggest an attempt to distribute malware or phishing content, likely through a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9684

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://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/4kql0k0dadob7ontovpbs1tcd1/wasugogoboposuzukimimub.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/a87a61a0de7973f4f0cd722e16013323/64029060884.pdf
    • http://teplolux72.ru/upload/file/bupiwaxu.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c02ba42e28a---mejubuserologepafowowaput.pdf
    • http://www.bandungmesin.com/file/zapanojat.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/c4uiq9h815solm6dg2g0846ukl/ponunovunulu.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/fa6eb340e68923853df80dad35e1bfc4/ruledopagidivorogo.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4f8fb210f---ninigivufejelijuvan.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/124ad4c91ba123fa048de53b21805e0b/panov.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608692e49c13b---begenamizuvo.pdf
    • https://banghenails.com/upload/file/38624872579.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/f6f99591f2f600cdcb7a6a34c8da6dd4/1152118697.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c55f774b6---vemijomolejodoladimi.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160980e4c11bfa---62806955120.pdf
    • https://tepihtrava.rs//files/71326202168.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a12dae88319---jijuligeje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=cbse+11th+chemistry+book+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcc8.bin
79f99878a7fee72c87f5d812c15f7331bb466bdb560efa078d540e46fdfb0abc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC8 5416 bytes

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