Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f68158d037e922…

MALICIOUS

PDF

84.5 KB Created: 2021-09-06 13:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0dce2d62fc2f2822c8ed7298e9604f11 SHA-1: aa045c491ff8fb620c1699eb4210c4a4462db356 SHA-256: d2f68158d037e922520eca6a6c4fc7c8abb5f963cb41d4a82169edd9b658b014
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations used for hosting malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan distribution intent. The presence of multiple external URIs and link farm heuristics indicates the primary function is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.1831

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://inwebjor.ru/uplcv?utm_term=cancionero+francesco+petrarca+pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099dda2831f0---fumugasujokimoja.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/2b05b9a23f11c67a3e8b214be6e35615/jaxer.pdf
    • https://perfectsextherapy.com/public_html/userfiles/file/6687156830.pdf
    • http://svaz-podnikani.cz/files/file/dabigoditanenurupur.pdf
    • https://peterdegendt.be/file/26498305263.pdf
    • https://aporpeter.ro/userfiles/file/nituxalarazejedenumazeges.pdf
    • http://tokyoto.pl/UserFiles/file/11698436355.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8f2e4d50d---76130856845.pdf
    • http://iviltra.lt/images/files/devakuwegipomef.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e279b10de2a---75321217915.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c505b3551a---4862166189.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7add81bd2---nasegiwuvojuro.pdf
    • https://techielingo.com/fck_uploads/files/xufozatasivojeno.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751c580b109---36601871405.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a5e1673f0---zawuwukaxuvunezegimu.pdf
    • http://generoussecurity.com/uploads/megavefadisutobum.pdf
    • http://simoncaulkin.com/images/80840977273.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/d3f4177d354a920e700022767d5e128f/webilu.pdf
    • http://chieucoingason.vn/files/kazanapuzogo.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afda22a0e23---lesomeribumoz.pdf
    • http://ccswcd.com/userfiles/file/dazimizazaz.pdf
    • https://bselink.com/userfiles/file/goganuri.pdf
    • http://wsp.pl/userfiles/file/vuvudevimemipoxutefal.pdf
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/akdau05chqb4hl8n8m48oupsrj/54219000313.pdf
    • https://safe-international.com/userfiles/file/73098080388.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/u13eitbli44qs5ilgt4em547gn/wosesijugizef.pdf
    • 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_off0000f6aa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AA 16792 bytes
font_01_sfnt_off00010ec1.bin
c28b5bab3f20d1e573958f62eb57fe96c157fb6e14d7ddbe0b4accb76974e370		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC1 10596 bytes

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