Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d542c0f470e1357…

MALICIOUS

PDF

91.8 KB Created: 2021-08-10 21:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c4ebed36999023d824cc8d7cef22d982 SHA-1: de285092b2244c4d4ab9493a2e32c7381818cd80 SHA-256: 2d542c0f470e13575661e5db3f665cdbd8d364148bb5365d5992e47f5d64f7d5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites hosting PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body is unreadable binary data, suggesting it's not intended for direct user consumption but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5632

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 2

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
font_01_sfnt_off00013a8f.bin
e777ab78672ff27552475bcd8d365ee7454d985893b5e3023f905a0bf84e3eb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8F 11036 bytes

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