Malicious PDF — malware analysis report

Static analysis result for SHA-256 f061ae59cde712c0…

MALICIOUS

PDF

69.2 KB Created: 2021-09-16 01:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 01a7cf00864ebe06448a817f0e672d47 SHA-1: 219e822941a75f6f89af50adaf53e66081040dda SHA-256: f061ae59cde712c000584c66954031304e1552561043d36c7036c85f6e1c0cad
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous URLs that lead to external websites, some of which are hosted on compromised WordPress installations. The presence of 'utm_term' parameters suggests an attempt to track user engagement with these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5455

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://archism.ru/uplcv?utm_term=velocity+vs+time+graph+at+rest PDF link annotation
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613451dd50f77---nipizotot.pdfIn PDF document text
    • https://kawanmto.net/contents/files/kovimakezoxumifizuzofa.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/63792451668.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161413bb8b65e1---tusupozelexalup.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/34456648778.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/10954589317.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/litowonenumatavi.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8f012e5cd---6302503206.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/lufodub.pdfIn PDF document text
    • http://fpole.ru/sadm_files/vimikatozuzepekumaxur.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16137510c91b52---dukamipitilalapovi.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/feledonilaforurenizivor.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140a6cf3eb33---lerujo.pdfIn PDF document text
    • https://ms2oke.com/contents/files/tarubexomomodowaniwomepa.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/fiwanidix.pdfIn PDF document text
    • http://ctm.it/userfiles/file/88111451907.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/71293470633.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/xemigofesiruvajosepuvu.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/ditoxurejosigokekogafo.pdfIn PDF document text
    • http://octapus.vn/images/uploads/files/10626549795.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/pegodadasisibisepixak.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/rebamobugetud.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_off0000cedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDD 17568 bytes
SHA-256: 17b83dd2c6ed2e650c76b3d2c3c6a0551c44c55577959538edd1b9d5cd78fc30
font_01_sfnt_off0000fcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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