Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f1137ddeb0c46d…

MALICIOUS

PDF

79.0 KB Created: 2021-09-18 20:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 65a1cbe5c1c740d7d6d94fd00ebc2ac4 SHA-1: c27fcd7af1d24822272666855d6a75e6cfe83851 SHA-256: c1f1137ddeb0c46dbd2fa029df986d9d2a0ecb68406dd232d2530fabbcab3284
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate maliciousness. It contains a link farm with multiple URLs pointing to potentially compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution attempt. Embedded JavaScript streams are also present, which could be used to further exploit the user or redirect them to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7432

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://betentour.com/sites/default/files/file/92681535715.pdf In PDF document text
    • http://paitoonbox.com/userfiles/files/14168778089.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf995a0199---minulaw.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/kekinatodoxabimerepoxi.pdfIn PDF document text
    • http://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/43199675454.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/83759981596.pdfIn PDF document text
    • http://szcftz.com/upload/2428042947.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/10366195571.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/35398383240.pdfIn PDF document text
    • http://denprokhorov.ru/images/file/komugefewulekewawafepa.pdfIn PDF document text
    • http://fishingas.com/userfiles/file/5273687875.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109160400476231.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/tuxigo.pdfIn PDF document text
    • http://15881588.com/ckupload/files/bugiguriwuxikajuxokegede.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/suriwubuturitag.pdfIn PDF document text
    • http://www.klimavill.com/data/editorfile/gozuvanawujoxerusonitife.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/suwonuwinarugalojemuw.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613073e013e2e---giwulonapumuwivuxide.pdfIn PDF document text
    • https://stonebuild.bg/f/uploads/files/susixogomonotiputolakaja.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/33960870821.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/vokibelilupog.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9a4832810---dudivezeled.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/39560094585.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/0056e60cf273d389f8748c5c8f2bbb91/lufasebe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=watch+office+space+123moviesPDF link annotation
    • 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_off0000e853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE853 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001006a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006A 10900 bytes
SHA-256: 0a2929502448980496d44e3506fe3a03fdfdfaefe274cd8ac0e0080ea2a56c58

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