Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb66e0a015107db3…

MALICIOUS

PDF

82.7 KB Created: 2021-09-05 23:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f3d3269ed8ed13eacc76e5bc66ee973 SHA-1: 8af96387ea4a5332a02fa85565458fcdd8d4dd9a SHA-256: eb66e0a015107db3fe041f444bb5f1bdeb08882c090d96dc3a67df1e9e235944
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to various domains, some of which appear to be hosted on compromised CMS upload storage. The primary purpose seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://iberia-ex.com/images/blog//file/kanewonedidesir.pdf
    • http://acevina.com/webroot/img/files/toxifekazepulolun.pdf
    • http://asude.istanbul/ck_images/files/48654526176.pdf
    • https://marathonblainville.com/userfiles/files/46543721035.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/butt4ij3mjvcnjmtmdoa6l2kjo/21257841911.pdf
    • http://hitelesen.com/userfiles/file/77858201256.pdf
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/53675564031.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868170cedae---80188104450.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/36a4d5a49e9baa4f3c2d567da8892e78/wafomoxofiwakarukorafelu.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606fea4c6d89f---84490901044.pdf
    • http://www.alfapilates.pl/upload/file/fipuz.pdf
    • https://psg66.ru/admin/ckfinder/userfiles/files/59299950143.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e4b897dc27---61056706666.pdf
    • https://martensmgt.com/business_school/uploads/file/jaliwutavu.pdf
    • https://thingstodobahrain.net/ckfinder/userfiles/files/21171549827.pdf
    • https://listapp.in/ci/userfiles/files/wegigobu.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/9289191593.pdf
    • http://engroupe.ca/aym_image/files/63134397549.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/ea059ce433f6344b421e1f997940ce92/95085038919.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/5upluik9bgeuv14g9aghdunqne/xexawejamopozodokufiposu.pdf
    • http://churchtextile.com/userfiles/file/76292827033.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=critical+care+nursing+a+holistic+approach+9th+edition+pdf
    • http://s292376414.onlinehome.fr/datas/imgmail/file/sasurutufafis.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb8.bin
4d14b136a03acba25ee30f839af3390fae763e327a23efeac81f53535ef8aa13
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB8 11200 bytes
font_01_sfnt_off0000f6b5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 16792 bytes
font_02_sfnt_off00010ec7.bin
12c5d7926fe11f235c8db419f53ce6e4570a5d7f34de23efd35153d24b1fddf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC7 17644 bytes