Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3e7e382d82bddb…

MALICIOUS

PDF

74.8 KB Created: 2021-09-20 04:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d68097b96bd9fb87ba9d12aa575705d0 SHA-1: cb1dd90c070bbeacd6651c597ba884d447458709 SHA-256: ee3e7e382d82bddbf8d09b8d3328db47e8ce01354043f52b5a932f43020a79ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of external URI heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://coretry.ru/uplcv?utm_term=jumanji+1995+123movies
    • http://dichvumucin.com/upload/ckupload/files/36490902540.pdf
    • http://zhhyhb.com/uploadfiles/files/50561628516.pdf
    • http://veoguidecostarica.com/ci/userfiles/files/72099425738.pdf
    • https://sibservis.com/ckfinder/userfiles/files/puxunimafuvefa.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd0d1dedb8---34329497318.pdf
    • https://kop-trans.pl/uploads/userfiles/files/32918860360.pdf
    • http://3qbuy.com/CKEdit/upload/files/98663407010.pdf
    • http://geombiagioschettino.eu/userfiles/files/63584820989.pdf
    • http://rezidencianestor.sk/app/webroot/files/ckeditor/files/39695546695.pdf
    • http://ttmplus.com/userfiles/files/56544438928.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133ade1e0989---8752343790.pdf
    • http://bunny888.com/ckfinder/userfiles/files/17290174130.pdf
    • http://czechdidgeridoo.com/admin/upload/file/jukonosulepaxozub.pdf
    • http://www.icareonline.net.au/ckfinder/icare/files/woripurorokifitimevexadu.pdf
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16144086c54936---44528509037.pdf
    • https://trouver-une-ssii.com/img/pics/files/nudaremobudusapigasonut.pdf
    • http://erfanekeshmiri.ir/userfiles/file/feduwigedodededod.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b0385bdb4---gobifewenuropugu.pdf
    • http://sladkiy-ostrov.ru/userfiles/files/73082694747.pdf
    • http://skulpt.in/admin/uploads/file/pinolikubatuwelezobuvoro.pdf
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/veliv.pdf
    • https://ibrahimkoc.com/images/Media/files/waxajutevivogino.pdf
    • https://granitnet.hu/editor_up/bagideliwuxuxopogoku.pdf
    • http://www.sandipmallick.com/fckimages/file/wexub.pdf
    • http://thomasgearon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76545561755.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_off0000bfa3.bin
6bbb705cccf7c1abc6cf47af8d67d8a2f50f979fb84c953eeb275966ea46b1fb
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA3 17236 bytes
font_01_sfnt_off0000ec07.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC07 16792 bytes
font_02_sfnt_off0001041e.bin
414685ebca92a71472ceaceff0ae1a916b7dbe930ba80b46ebef64ba4b32f260
pdf-font-stream PDF embedded font (sfnt) at offset 0x1041E 10960 bytes