Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20641d015488cf4…

MALICIOUS

PDF

64.0 KB Created: 2021-09-02 09:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4bfe07fbf038fd703764ea511877f1b8 SHA-1: df873b5c9936f43354111487d329f443227f72c0 SHA-256: f20641d015488cf461e00f0abe81b8bce64679c839a69eee046ccee1931f9cd2
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, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to websites, several of which are hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9183

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://stehovani-ostrava.cz/static_pages_files/file/15791616847.pdf In PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123ccd05bf73---40180017253.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b472e8b5fed---99305291817.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/a27113521bd0f86085da7f4de28fe655/60230801473.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a51fdea9ae---41794091978.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/59955785410.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/64670998419.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/rcag7bgatm6qqbdtrnhkk4jsm1/50721537533.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160e7b7993ec0f---39749180373.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/jofus.pdfIn PDF document text
    • https://samowar.ch/upload/file/xenexozof.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/gilakogofapo.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/7042785200.pdfIn PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/70819916859.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160adc7df141cc---32812536945.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/pulipefijurolomexuduwate.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e75692cfb---poreluwanow.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b47193a96b---54561525309.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/3cace069c37b9c83b2d846e6ee2ce67d/niripi.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa6d1051fe---3333068022.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/rolupoxepumesu.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/168f50d4f03eb66e244b0b3e253ef1f9/lezefexe.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/78010805616.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/nogeginesoxi.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210602182207.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=kelly+clarkson+and+justinPDF 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_off0000dc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.