Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4a8b4c2f245888…

MALICIOUS

PDF

62.3 KB Created: 2021-10-07 20:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c6811a8b9058c7aa01a8a83122274dfa SHA-1: 661ee45904f35326e342df5c5f4bf6ccb3c87946 SHA-256: 0c4a8b4c2f245888aa9d918145b04c43c88ac636556b14ead7ae7432e3fdda29
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be redirecting users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7260

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://oniceh.ru/uplcv?utm_term=how+to+do+a+manual+on+bmx PDF link annotation
    • http://kingswaytyres.com/project/kingsway/uploads/file/64379040380.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/41124917115.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/0857d6663765b82e0989c5522efce510/papinijenomupaxikirot.pdfIn PDF document text
    • http://kurtoglumob.com/upload/file/bajuvetadonodozadow.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/539udb5cpn9qhmn474p2dnv24f/25286081970.pdfIn PDF document text
    • https://anup.bo/images/files/duraribixobo.pdfIn PDF document text
    • http://arablift.net/userfiles/file/buxowu.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/ccs1h8upls4f4vjg3sj9b7ee30/45626549419.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/jimblimj9v97kjpe6pkdv8rvl8/77707489627.pdfIn PDF document text
    • http://peknanevesta.sk/media/file/88689686877.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/vewesumutagu.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/32611534453.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ff5fd1cf286f08b4c5f6b97ec57bbb6d/figodojopejose.pdfIn PDF document text
    • https://livbiopharma.com/userfiles/file/86152413076.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/48006105467.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614c2d2be1c16---54922855875.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/50439343692.pdfIn PDF document text
    • https://ywint.com/ckfinder/userfiles/files/1632679602.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210908_032933_113.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/ce1a3e0c68abe87681a29330c47337aa/rilozizozivakadiruzamujis.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/vinarizime.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/sisosobumedovaporiwakuza.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/10025851378.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/44201348459.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614d1284d53e5---21849903487.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05F 10336 bytes
SHA-256: 821441bb2b5d16994aac7f95d556bf9711eac57ac59ff4bb7bd93e34fbba9420

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