Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba68c387fd6f25bb…

MALICIOUS

PDF

64.7 KB Created: 2021-09-13 18:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1d02e17a41946fe68ac237a15e0e04ca SHA-1: cbe8b36c0c845052fd1011c93970b65e767b38a1 SHA-256: ba68c387fd6f25bbe51b06159308b376551e86b21d69bbacb35df2dabaf4beae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

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://philabc.ru/uplcv?utm_term=sflix+apk+download PDF link annotation
    • http://www.impactit.in/ckfinder/userfiles/files/96405680853.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/xiwevuxuzodevavebirosi.pdfIn PDF document text
    • http://mimpishio1.com/contents/files/soguvolo.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/80869509300.pdfIn PDF document text
    • http://millecolori.it/images/file/56840026261.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109090407379989.pdfIn PDF document text
    • http://artgrafika.cz/userfiles/file/fiwilofakufanudefinupa.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/gozazezubinoximufolo.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/jiruv.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0b097b8e6---zidatuw.pdfIn PDF document text
    • http://krzeptowski.pl/file/92971392129.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/99488500504.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/81187231535.pdfIn PDF document text
    • http://cbstav.cz/file/telewuvegagome.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/bruut6mfho77qiohc12ki7r025/84940583393.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613718556d8d3---84759109506.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/bolotikupaf.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/ruwogotoxad.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/kijusugekoxozipalanok.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1612f854bcb355---84049460702.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/37388220327.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/marilafuwi.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/61788036283.pdfIn PDF document text
    • https://www.hkha.org/ckfinder/userfiles/files/fobuzamasikulosodazijuded.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_off0000d133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD133 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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