Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d4f3fd1316d627…

MALICIOUS

PDF

72.1 KB Created: 2021-07-02 00:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4f414482d879940cf0869bb82e306c64 SHA-1: e65c733f9eabb554404b6bceced603ba2a0ec2f2 SHA-256: d9d4f3fd1316d6275b9311971ebd3bda1999e4efc0cb36227e9e84d3933d349d
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The embedded URLs are designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6736

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 http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074508ebcd81---77232871038.pdf In PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6d7246367---gatuz.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/vajadegelasamefexiwo.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210626133010.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/169972424160924b0f5cc81.pdfIn PDF document text
    • https://advik.net/userfiles/file/52862745618.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47801401f5---97787257509.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe86932159---vabitedegufija.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/mogiludijuvakoraweva.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/vebadurukidov.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/8751013859.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/43331744576.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/08b8eb3bc946f22dce45c77f7468d5ba/ziwifuzaxudutezevavobidu.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d15a8e48f---83128618818.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/84a624008b53d1382e6aa3925e322e45/xomuzugusopeneluruzafoji.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/ed3ec6a8e3cf7c49c90e36fcd763dcde/vagepebegaragavofijeto.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/uudcbi6kpigus8uoldom07sf8m/94029770402.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/e81642775b2965422ba47d4532634353/dogakozozofomimoxo.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a032bf685---medogiwexirodifa.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc6d3c7d52---48545854155.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/95567701594.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=nifty+gainers+losers+todayPDF link annotation
    • 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_off0000d855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD855 10620 bytes
SHA-256: 2fe213448b5982c8dedbfbce02ca935eb87596922f634041ce684af1b1d75a57
font_01_sfnt_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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