Malicious PDF — malware analysis report

Static analysis result for SHA-256 6689574d5602fb46…

MALICIOUS

PDF

87.2 KB Created: 2021-06-22 17:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daccc5b7b7a00f490aa7c4177cdd2d8a SHA-1: e6272de66843d40e2abc448ef5aabbd028d58f14 SHA-256: 6689574d5602fb46b16656fccab270249aafd0c3a2b3a16532007b168d049990
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to redirect users to malicious sites. The document body contains obfuscated text and metadata related to '50 shades freed yts', suggesting a lure to entice users to click the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8346

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://nomylo.ru/uplcv?utm_term=50+shades+freed+yts
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b434b366e1e---xiremezowodidaku.pdf
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/wiketiwusosaxusenapasevis.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/698f1594d4fda863e8f065f24d890220/legatemipugevaze.pdf
    • https://itracmediav5.com/ckfinder/userfiles/files/gumoliwal.pdf
    • https://vestol.bg/files/file/51070602494.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/6dc35e22e724543f560e1653eb902797/deragetovaguvowijefeb.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/jekipolikinobexukanub.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e26a1eefcd---71352242078.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/263q533k9gnqfhtat23tprfpvs/41702215939.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/008bd375463961c3f266cdbd1f92b737/46731576788.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160be9e8c4cd4e---divoliladipuxasejuzite.pdf
    • https://ikima.fr/uploads/file/vomitugax.pdf
    • http://andlupa.com/userfiles/file/bosepila.pdf
    • http://tortsurprise.ru/upload/redactor/files/76051977728.pdf
    • http://ahxxzx.com/userfiles/202105/file/58435398527.pdf
    • http://portalcom-b2b.es/img/user///file/_0598797001621477873.pdf
    • http://allasclub.com/campannas/file/nuredaw.pdf
    • http://matsonconstruction.net/userfiles/file/83789191173.pdf
    • https://bisnismedsos.com/userfiles/file/60665632958.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/56875439.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e23.bin
e710507c8f72127b4027aacfcbafbb50f0b4ffba511e6331a56bab64c16fc0df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E23 11212 bytes
font_01_sfnt_off00012d00.bin
a0ac0ea99c8221a869a30ad252742ad7876722d5590444f6cc4b10a3ad44bf8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D00 7248 bytes
font_02_sfnt_off000145cb.bin
015fc91f40c8072ff757e75f805dcdc6a6081b22c353d35f9b92599eea58da50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145CB 5236 bytes

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