Malicious PDF — malware analysis report

Static analysis result for SHA-256 f175ce7c7142a356…

MALICIOUS

PDF

70.3 KB Created: 2021-09-16 08:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c1140b19af5197aa109b255952f515ad SHA-1: 27061553010fa84b6e0ef9bd2ae4b8c778a8f3a5 SHA-256: f175ce7c7142a3569f213ab342ff9f42ab994bf1dfeeefa432e62096d99c4c4f
154 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to various websites, including those hosted on compromised WordPress installations. The document body is heavily obfuscated and unreadable, suggesting it is not intended for direct user interaction but rather to facilitate redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7121

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://jplus-ag.com/upload/files/BodyFile__613ECFE5070D2.pdf In PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/161363ab230dd2---41494906895.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/2758d750cf5123496d4bec7d6ede55d3/51238646538.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/1631723804583.pdfIn PDF document text
    • https://klcconsulting.eu/klc/file/4391762664.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/sogojebelinetesojezev.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/9d20bd4ec6cdc01dfce0be72bcb8729b/fimilum.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/vaxukufamuvemak.pdfIn PDF document text
    • http://taxfreepoint.com/file/murowivagovotege.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/buxaluzokebonotejave.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/batupa.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161398bf03e247---tigeletuzuwitugogufogot.pdfIn PDF document text
    • https://gamepinleri.net/calisma2/files/uploads/matuvamojevefekewumazi.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/91407395195.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/sowasukifiwotem.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/xobebam.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140e124dc072---bimoxanipasatimatas.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63476392413.pdfIn PDF document text
    • http://bratislava.topenglish.sk/app/webroot/gallery/files/15694920856.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613d93d3bd58c---82128183550.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/wexeminiwenubunul.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d480315e28---27148303352.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/wokelakiwibebuxekofer.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/jefofezaragi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=one+piece+dub+streamPDF 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_off0000e9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EF 19216 bytes
SHA-256: c4f831828775e4e61e4a9869ce80b954c32c60dce74d34f474e0d996b4a6ba49

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