Malicious PDF — malware analysis report

Static analysis result for SHA-256 5212394859cce8c8…

MALICIOUS

PDF

59.6 KB Created: 2021-09-14 03:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 16a75f7a9d5ab86357099054ac40c454 SHA-1: 427cc122ba1b15d6119749fbf5e6a8f020979c79 SHA-256: 5212394859cce8c801810a32af68251fb88187ba243ab49347dfbbef7fccca47
124 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, many pointing to PDF files on suspicious domains, indicating it functions as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies this pattern, suggesting the document's purpose is to lure users to external malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7743

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://dsraxys.com/uploads/29844462834.pdf In PDF document text
    • http://thepokewave.com/uploads/files/tekixewipe.pdfIn PDF document text
    • http://kk-gorenjska.si/uporabnik/file/jobom.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/gipefiga.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/badupezowepejovesan.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/7773097185.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/kepej.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc7ccbd5a6---nopiguwoxowokexarikoguko.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202109091644367109.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/1787948032.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/40701421499.pdfIn PDF document text
    • http://lindendirect.com/tempimg/file/vafuvak.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/guwasiroguzumozute.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613dcf931ca20---zepuvexuzevasarizegigim.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/kexokumivuro.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/81805513241.pdfIn PDF document text
    • http://charolais-hessen.de/write/userfiles/file/71565938406.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/30824373161.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/bitibixo.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/vediwekonuruzefumokeseli.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/9983729956.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/fuxuwasut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=drastic+full+version+free+downloadPDF 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_off0000be1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1B 10724 bytes
SHA-256: 7a927e393af72d14f218eff226a8ab9859b762a4aadbc0060a0d000f226a961c
font_01_sfnt_off0000d6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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