Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b2fdbb01806ab6…

MALICIOUS

PDF

75.6 KB Created: 2021-09-05 06:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 92c87f28f0b1335d8d8c76170663fcdf SHA-1: 2373c7261fd9da50237cef1bade4555d8770e770 SHA-256: f2b2fdbb01806ab65ec5f8139de22c3baef299252be381801d1562777c8a8a59
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of links, many pointing to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates it's a link farm on disposable hosting, suggesting a tactic to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5832

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://dpt-mh.com/uploads/news/files/33644380047.pdf In PDF document text
    • http://bloodfaces.de/attachment/file/fesupipipesoximinorelok.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/e7924330b94b48448492ce05c0459525/durijopoxulokuzezaxazep.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/8q5att1vf0gv5ig2ga82d5ktb7/21948627725.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c387fdc4c9---zosejolimiruvofaregixiter.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/dilorazitam.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160848f34262d4---gepitijowowapuji.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083550865d5f---45516322451.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/zanoxejukafubozawijebazep.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/65743608856.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/duwetategexujof.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/rl8fia79rk34n6kail2ioivip2/59272058172.pdfIn PDF document text
    • http://serting.eu/userfiles/files/zololomelatesagakafag.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/21600813526.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b36a0b6c2bc---66322677166.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/h7t0ffr3ue7l30kf9n37isqf86/20552134402.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/jufirofapijugemo.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/97990033287.pdfIn PDF document text
    • http://www.celso.org/download/16080626009.pdfIn PDF document text
    • http://voijin.com/userfiles/files/50527270987.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/639c57b48ab07fb0f8b5fda6d2900117/9589631111.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b320c2455d3---89592116588.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/190246147253.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/67136620357.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=ophthalmology+ak+khurana+pdf+downloadPDF 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_off0000d74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74B 18256 bytes
SHA-256: bb3857673060cfdceb30615e4dfbe77d72e1c35b3525ef202ba219d5bafff62d
font_01_sfnt_off000106fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FE 10968 bytes
SHA-256: 0929ae91b1ddf531d5b7cf60c2ceb747adc7cec7dd2175c25f14447b83064b33