Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c866cce60a59fe…

MALICIOUS

PDF

77.9 KB Created: 2021-08-10 21:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1fc19341564a4e13ba86f2478c98411f SHA-1: 7a1ede1cad8d0473a364e7b218949daa8fa53416 SHA-256: 62c866cce60a59fedab37ea2d8cf403ea85b8866401b9e0f31d075df8265c88f
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous links on disposable hosting and compromised CMS uploads suggests an attempt to obscure the true destination or leverage existing vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7291

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://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbede58cc9---xaxesixukivoger.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b498fbb2093---xesobala.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/4b0a2ba2a2d36c44b7ef450a698a1862/10325488057.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c318cf0f33---nevupavujajopuje.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a07b6ffae---todatuvorisap.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088019b0d99e---poromakimefesir.pdf
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/forupageruludumeleg.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b9790d279---sawobisukonesotizig.pdf
    • https://zoldlepes.hu/userfiles/file/fujorituwesuxuxigiro.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/i97r29mo6ebehfb8tve0ngsmd9/57909759407.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/ecbgt4b3fsgk081bl584ul0e4u/pilitexejamonenuluxuj.pdf
    • http://lyshiying.com/d/files/kosenorurewinexepem.pdf
    • https://adepotcustom.com/UploadFiles/file/20210429062202122.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df603c81a15---jazul.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/6bff693920c01a5bcc5c201d6f0494b6/87135737855.pdf
    • http://m3hotels.com/userfiles/file/65110061100.pdf
    • http://tomlitkom.ru/ckfinder/userfiles/files/69635975861.pdf
    • https://addsfly.com/userfiles/file/27172172318.pdf
    • http://lulanjina.net/upload/files/10172973633.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc83974678---xesamux.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/ijddks3ab81f8veopis20505q2/ritami.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c94eb77cb36---lekoduvezefuw.pdf
    • http://ahxxzx.com/userfiles/202105/file/96320180310.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4f99a00b4---videfuxit.pdf
    • http://agataklimowska.pl/userfiles/file/51194203102.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65dd2565d9---69820843601.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=game+of+thrones+season+1-6+blu+ray
    • 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_off00012278.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12278 16792 bytes

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