Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c016213fd10140…

MALICIOUS

PDF

65.4 KB Created: 2021-05-28 21:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cb1fa9b032134b9241ce3aeeaf5d4be SHA-1: 67d7fd4c2676b2f96f1f491316ceb7952854b88c SHA-256: d4c016213fd1014067fb50740de7740af68f019a47d2342b659a75b6253bb610
154 Risk Score

Malware Insights

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

This PDF is classified as malicious by ML and ClamAV, and exhibits characteristics of a link farm. The document body, though heavily obfuscated, contains text related to 'Gandhi malayalam kavitha mp3 free download', suggesting a lure for users seeking free content. The embedded URLs point to compromised CMS upload storage and disposable hosting, indicating an attempt to distribute further malicious content. No scripts were extracted, but the PDF structure itself is indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9493

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 http://omonetach.pl/foto/ilustracje/file/25659219045.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160811c0de7404---malabeji.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd796b0f6d---3830622756.pdf
    • https://aimhc.com/userfiles/file/kebirujiwiso.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/044bfcf3ade782300ae021787ea9f66d/42029341090.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/4c6tmlika5d0k276dnmq8rd4fm/kudiwimuvikewamar.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16073c53d0f685---vusixijo.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/1c1e20149aa2bb348b2f627ccefcb1c1/lizewomirojogokobikili.pdf
    • http://bularz-auto.pl/images/userfiles/file/19092623271.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160737e01bf1f6---gozupazere.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0551c8e696---19906688102.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/43a83514a847ae0b5311047b91d4dfac/xebebafodi.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/b0ebb59d5b85c6fe538b76b8c45f2f86/dupazamiwiwema.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16098af065d8cd---28791945792.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607eecf9dbce4---wagifanudewute.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c87dd64438---jikasumaxejosagomafeluz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=gandhi+malayalam+kavitha+mp3+free+download
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c98a.bin
ec83ee60317757a33cc7873ae768217030af63e4e1d7cc5e3209c1b54aaff697		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC98A 7740 bytes
font_01_sfnt_off0000e40c.bin
0c74d0570beda75e1272cea0e7da04f237947448fa9777dfe2cee5df5621eb7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE40C 5616 bytes

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