Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce896b035faf6e6e…

MALICIOUS

PDF

74.1 KB Created: 2021-09-09 09:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 369a8d178f1846dc20428dfe31250f97 SHA-1: 16fd8f21929692e9bc6b708e8c88282a59775637 SHA-256: ce896b035faf6e6ed06673958e8d62a064705184e5cae6550ae5534b44bbb089
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to compromised websites and disposable hosting, characteristic of a link farm used for phishing or malware distribution. The presence of 'utm_term' in one of the URLs suggests an attempt to track user engagement with the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7043

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://pistant.ru/uplcv?utm_term=cute+u+apk+download PDF link annotation
    • http://coquicart.com/ckeditor/ckfinder/core/connector/php/uploads/files/latimix.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/e8cl6dik46l1aceu591ger4nu9/41633065614.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16131bfe27205f---76423908019.pdfIn PDF document text
    • http://starfishdowney.com/uploads/files/jixusisezegijo.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/24236085354.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/niwojegazigib.pdfIn PDF document text
    • https://riosemarescentrodemergulho.com/ckfinder/files/lefetit.pdfIn PDF document text
    • https://tahitotfalu.hu/ckfinder/userfiles/files/76694061397.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210905_062819.pdfIn PDF document text
    • https://brs.jo/userfiles/files/rokikewoxajijowusiwi.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/31249582229.pdfIn PDF document text
    • https://hippodrome-compiegne.fr/www/uploads/file/relegigenubemaxorapavo.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/46974239475.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/59110303567.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/dijowej.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16139365300912---kajodomoxenus.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/14045872682.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161371885eafe6---leguvikatenavodezidibimed.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/dabapetusir.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/xapolatitokiliwegapi.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/12776872407.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/sozigezexinirokigutatug.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/koporewisoxipedisijodotaw.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/remikabirurusevugakira.pdfIn PDF document text
    • http://termocity.by/pics/files/xuwatepuvoxejidiv.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/47379311952.pdfIn PDF document text
    • 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_off0000ded0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED0 18688 bytes
SHA-256: 089840355719a79db14e87b92d7555e950c296097f93dfbe0fb5878f96b60c16
font_01_sfnt_off00010f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5C 10336 bytes
SHA-256: 245d53865ab07d8fa4b79af2d059b18a3c8da24447a301c90dd17f3da8782ce0