Malicious PDF — malware analysis report

Static analysis result for SHA-256 2487e92e066adc92…

MALICIOUS

PDF

65.1 KB Created: 2021-09-17 18:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 48f1a0c40023af7df71f5ad9234ea611 SHA-1: 751068fd589b601d968821517607ae04d0c60cda SHA-256: 2487e92e066adc92f3fc97ab10ca138f9970704be462c007d7c655898a54e80c
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised CMS uploads and disposable domains. The ClamAV detection and ML classifier further indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7082

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://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131fe4457ffb---47589453341.pdf
    • http://rkenterprisesonline.com/FCKeditor/file/konililakitokopewani.pdf
    • http://sladkiy-ostrov.ru/userfiles/files/41482077173.pdf
    • https://sukhayurveda.in/userfiles/file/78010741167.pdf
    • http://salkim.com/userfiles/file/xenew.pdf
    • http://espacioschillout.es/images/admin/file/vebixadarumuledevagukozev.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/3sphmk6p2c59cofdm2ufiqc4m4/83746797523.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/lc8ffmjapbrjtiiuhegqbce0pg/9204593418.pdf
    • http://zhongguohuachun.com/d/files/kosawatavasaxusaj.pdf
    • http://energo-winstal.pl/userfiles/file/26421858873.pdf
    • http://anhhieu.vn/hinhanh/file/senawusamobagufizo.pdf
    • http://karlsbach.de/userfiles/files/24178930046.pdf
    • https://pmsp-me.com/userfiles/files/jawimegitil.pdf
    • http://saxonrt.hu/img/userfiles/files/nurafakoxe.pdf
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12532251253.pdf
    • http://vasvaripalmuzeum.hu/upload/file/jixowiravawip.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161403496af364---95133189679.pdf
    • http://web300k.com/upload/ck/files/77727411784.pdf
    • http://dokturmice.com/ckfinder/userfiles/files/5022112633.pdf
    • http://shceping.com/upFile/photos/2021-9/file/69490752996.pdf
    • https://gsm.company/ckfinder/userfiles/files/kadizafeg.pdf
    • http://zap-interactive.com/uploads/files/lozumorodoxonizusoliweg.pdf
    • https://mancomunidadvaldizarbe.com/userfiles/files/funuwigo.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/k8qmrch534efdbhpc64jba6ib6/67295310615.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=nfc+function+in+phone
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C3 16792 bytes

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