Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68613bf07d36e50…

MALICIOUS

PDF

89.7 KB Created: 2021-07-06 03:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d1918a7690ed2e924b4417646976d63 SHA-1: c4f1cecb1854b820d3ac516882cdadaff3f4cadd SHA-256: b68613bf07d36e50d26922ffef220998adc179060858b312fbb142470e2a84eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://chcial.ru/uplcv?utm_term=louise+hay+10+ways+to+love+yourself
    • https://panama4d.com/contents//files/kuzukunaw.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f808ecfe3b---gevipegenimomodotu.pdf
    • http://businessvaluationapp.com//fck_files/file/65644524304.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0bfedb9ad---9308039157.pdf
    • http://rayanchem.com/d/files/simogitovanet.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160846ed27302b---70381120525.pdf
    • https://al-wesam.com/userfiles/files/vugiloxapise.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/e303361a4b5d7e6b1e2ca5853953a327/kefovofolebamotibuj.pdf
    • https://majorsagilekvaros.hu/uploads/file/20144531837.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/aa6baa31df596c020987aee38fdf6c0c/sideropusodek.pdf
    • http://wildpflanzen-planung.de/file/pobapaluwopa.pdf
    • http://aftckwt.com/uploads/file/69323343435.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/b4e4d25e95e7c7ea5ded29f7294fba99/seluxasizanogulejapivil.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a662025abd7---jaruju.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7780a3573---piniga.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160984bc9c1fb5---13487052766.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085dd0d71924---jujemofejamurulew.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071f4d7132cf---87272124346.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/c4b076bdcaeaf9601ae9c706eec7a114/poroverowafulat.pdf
    • http://hotelgiottotorino.com/userfiles/files/99144461542.pdf
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/6bpur0ppkucnkvngrdo07g36as/xiwokenutowo.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/cb2f08959cdac72e8001dc648ad7c1bf/12509328990.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/9397fa20fb5eb5b1cdf53b9443cdba7b/36708218502.pdf
    • http://mn-print.ru/ckfinder/userfiles/files/vebobitajofimoxugos.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/908ebf38d805c71907c16035e87729bd/migonixilonarenonirodalen.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa7d63b5c6---movisapuxidirogopobig.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa28.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA28 16792 bytes
font_01_sfnt_off0001123f.bin
58d47cab05615a786c85d6020f5aa4aa70d4a48b0564b32670546bbae9ec4ec0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1123F 10704 bytes
font_02_sfnt_off00012b1f.bin
9731ef8191594069a11e3b2877218d0f190b2733bbcaa3e64c3671ab27358c0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1F 17704 bytes