Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f69202165e9a55e…

MALICIOUS

PDF

149.9 KB Created: 2021-08-07 23:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c71139eb9970b6bd11f68acb2d74aab1 SHA-1: 1bd162d569166ddf07756f5d00175d134004f988 SHA-256: 9f69202165e9a55e24fe90ee7e469c7b6c66ad8ba7037a2896790bccea956cfa
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 high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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://drafthe.ru/uplcv?utm_term=actividades+de+pensamiento+matematico+para+preescolar+3 PDF link annotation
    • https://aduanaldelvalle.com/userfiles/file/xaworexabejok.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/74839482259.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/42669382661.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/57880897692.pdfIn PDF document text
    • http://www.puhito.hu/uploads/jovixire.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/af62e06d1d34e7375f04e8f49d4263e7/kumenijewosezugiwo.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090ac26132da---poralifelaremevigabunive.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/131b0b2c08b6890a9c1fd9894a63468c/pubivupuridepewizo.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa03fdb4ea9---49445446455.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608274f2aa41f---gamiraji.pdfIn PDF document text
    • http://advicetao.eu/pictures/file/zapezuriniwolamizuj.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ef3eca80a---56239137912.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/voxemawibuzomukekane.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/eec14a02e211cf5fb66de343f4fe7fc3/gotululovokido.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a77ec2d8a---23389539241.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/41063210616.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/e129df27db4d376d5bedf0f751a04d6e/12657717796.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5cb1176fa---neledosijobasep.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/fugexesulafati.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608337fc63640---wavolowo.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/bva7639hif3la3ok8du7klgst5/35112384325.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/kipulisipe.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_off00020ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20FFD 19076 bytes
SHA-256: d346af71fd45cdda1488ea2cd644b4d0460c12f606654cc20acbd2047947a2ba
font_01_sfnt_off00023f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23F73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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