Malicious PDF — malware analysis report

Static analysis result for SHA-256 34839987eaabe9e1…

MALICIOUS

PDF

73.5 KB Created: 2021-09-06 01:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 132a4c29eaf29fd3a832fa3c677e6f31 SHA-1: e3bcbd2a3f4b143c00167f7bbb4b454e9c5bcd7a SHA-256: 34839987eaabe9e13fabd117ef5dc3090ee6c0dd992b78a44560ad2fc2a02468
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs pointing to compromised websites, many of which appear to be part of link farms designed to obscure the ultimate destination. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags this behavior, indicating a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://wastran.ru/uplcv?utm_term=guitar+chords+easy+songs+pdf PDF link annotation
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16082a2ef9edc2---rulomagaborosufomosa.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/39917012921.pdfIn PDF document text
    • http://camdohungdung.com/upload/files/deninonanekilununepawaz.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905eb014f15---87132004369.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/8a0a2c32e8b6ae52f0fb3535b5be27e7/56000905790.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e7962a9cc---jotapelami.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/jegelanilowasovewaju.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/aad443d9b677a58d8c7bf76a70c29d61/nejuj.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160860996a0182---kokomogasesamuzuw.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/puwevatimeji.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160739a9acae73---98265523205.pdfIn PDF document text
    • https://amgaa.org/temp/files/guluji.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607217013aff2---darinenibebogubotagebiraf.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8e6d9f19e---62086382416.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/pinifapifu.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/6610271282.pdfIn PDF document text
    • https://kamedia.vn/data/file/81349736905.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/bamivowutaxaxofo.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/75353566508.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/17f1959486db60ae9a5160ddf45a656c/finitizutozotaz.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/suxisukadotejidujifada.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/rabetugezezumifa.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/31654720426c7867dbbbac602f1d1df5/wagesokakejovata.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/xamadevisasora.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DE 11104 bytes
SHA-256: b9fdeb7645c28e524ea4e40dfa062f4f8b1d0e2c66dd7b77937514b773f341c9
font_01_sfnt_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1