Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d158269fe57904…

MALICIOUS

PDF

135.8 KB Created: 2021-08-04 10:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e94ddb8b9f199141aea614f4827290fe SHA-1: 2c2086918019b5ce7c39c993c4165af5caea2fdc SHA-256: 09d158269fe57904f51831082d03ecd1f6fa43b1c4402fbb247f86326089eb7f
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing phishing content or malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, and the document body was unreadable, but the presence of numerous external links on compromised infrastructure is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3318

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://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/07d64b91cd36778fe85657e53e82d09c/tebowimusoxesawuguretovi.pdf In PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/307cfc1880f0410ce36cca17eeb9dcb7/gozerifimowela.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/vil1uubnsrsv0d622h62ajuq91/87113568844.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/78335681164.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/68012994165.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ovttsdfa90kgfg57in3ct55b9q/seridobiberunojikijijimif.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/d4cf510f58be62b7f3911175157020f9/wokemurasuzivimopipelome.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/766554db9736118397966d6b41890479/86820239106.pdfIn PDF document text
    • http://candientuvibra.com/images/file/4127762162.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/23135680738.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/ab61d8c02bc095fa54a88ea41543e8ab/sinakivilupekesigomaker.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/bkiqddfdt093bn0j7fq8roh977/9847965686.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/retugabuwi.pdfIn PDF document text
    • https://eternalbliss.net/file/66191550469.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/1f575b4523a310308a81a42f4b0562f8/vawabufifu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e460613fac---femanumizolokimote.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609440007333b---91241446899.pdfIn PDF document text
    • http://thaide.org/userfiles/file/zojidariwifuzinoloton.pdfIn PDF document text
    • https://keongracun.org/contents//files/wijuremobujusovoroverenir.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/77281351965.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ba944e00f---lewivibageg.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/20779816065.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/96d72d571d01b5d6349407ff215a057e/givikilunosenereg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=supersu+root+apk+5.1+1PDF link annotation
    • 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_off0001d1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1E5 18292 bytes
SHA-256: 0f0cb6cb149013dee09d00d8564d2f777cf02702df909e18bbdc2e7194d8b51b
font_01_sfnt_off0002024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2024B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1