Malicious PDF — malware analysis report

Static analysis result for SHA-256 12eef0a72e2b14f2…

MALICIOUS

PDF

63.6 KB Created: 2021-09-04 17:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 23bab8304958674c57ac650c77a35a58 SHA-1: 1d073a04c10c39c3d2a18779ed293f5df3f3d356 SHA-256: 12eef0a72e2b14f2e652d85948ebde22f9a413f1d1293463cd1ef2b059c66c2e
154 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on multiple distinct, disposable domains, a common technique for distributing phishing lures or second-stage malware. ClamAV identified this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7155

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sluganarodu.org/userfiles/files/1364885540.pdf In PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/semibudegi.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b44e5e4be72---lasowabapisizapefes.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/7883029009.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/601ea852dc94346f2bacb8de34ea7f96/kutadu.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/47459770314.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607479a2ec26b---39866181455.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d0ec0a115---89646798202.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/1905147416.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/kebosivivepazelamifomoke.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/20049259438.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/49877134067.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/59871497287.pdfIn PDF document text
    • https://ksuskalology.com/images/file/sizuzutimerazila.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/96907934257.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/gelirime.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/284bc83d628b79b310a50631c95e5223/48338714415.pdfIn PDF document text
    • http://ieltsadd.ir/cache/fck_files/file/2127667710.pdfIn PDF document text
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/vugowixosositoka.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/gusodazewebut.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160941edcc4bf5---xerike.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/kupukepewidure.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/08/05/74222917945.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ceccato+150+manualPDF link annotation
    • 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_off0000d93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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