Malicious PDF — malware analysis report

Static analysis result for SHA-256 19febe3368b259d0…

MALICIOUS

PDF

63.8 KB Created: 2021-06-29 11:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7b9282506c2784dfdb18fddd2cafe384 SHA-1: 8e4b31a7a661ff0cb7fda1dbc50194727a075e1d SHA-256: 19febe3368b259d0f9a2e81f00fe9e5dce77f05e522e0478bcec65e24f9ba23c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or contains malicious content. The file functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites, suggesting an attempt to distribute further malicious content or phish users. No scripts were extracted from this sample, limiting the analysis of its direct execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6990

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 http://ohappy.org/userData/board/file/wivebeduvipeteta.pdf In PDF document text
    • http://studiomistretta.com/userfiles/files/tupukikelejedolupiji.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/eda56c0332f1f4ff17b2c359b5af2c83/bizubipibuwaledi.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/lpacepj2qgt9tuogpk1sbroob6/losadupagobawodopiw.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/50651806037.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa36ba4a409---xolelizakipemoziboramiz.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b0a073a4d---63515952556.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/66050902349.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e77c5fdfa---86320226600.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/8517873540.pdfIn PDF document text
    • http://bosch-service-center.ru/uploads/files/51881292606.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/49459469766.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/fadififivike.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/0frfh7hvqe5k4b2q5acur9vi96/83167494991.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/10458339746.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/14e6cd10cd0ab33f2dcae32bd76a33d7/31318458317.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/85602557504.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd35fa29c36---zesobefenajuxemixexi.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160bca52ec88fd---63535537951.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/78096931516.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/edt2o1s90qucufgmbfrhh77ivi/dulomamazisav.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/d280649385522ab49a47a9ca403a2b20/pevutatiniziwonefenikezi.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/725578904.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=6+letter+words+starting+with+jPDF 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_off0000ebc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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