Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebeb4426c9d5afa0…

MALICIOUS

PDF

69.2 KB Created: 2021-09-26 19:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7fad64f16b7ccd6e663c8e9eeafe96b4 SHA-1: d78c47fd527b7849912fa785ce351fb2f0419b1c SHA-256: ebeb4426c9d5afa0fa43ff7980265695838a5833eae6fbb3d09592fa10f146fc
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript which is likely responsible for the redirection to a link farm. This behavior, combined with the ClamAV detection and ML classifier flagging, strongly indicates a malicious phishing or SEO poisoning campaign. The numerous embedded URLs point to a strategy of distributing malicious content across many domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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
  • 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://pokwuttibut.com/file_media/file_image/file/99097795471.pdf In PDF document text
    • http://rent-lease-no1.com/userfiles/file/20210924235556.pdfIn PDF document text
    • http://gapp.fr/medias/files/63072384784.pdfIn PDF document text
    • https://bwhe.in/ckfinder/userfiles/files/xexelej.pdfIn PDF document text
    • https://www.albriug.com/static/editor/ckeditor/ckfinder/upfile/files/tuxilomedajinerede.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/71961955519.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/60670133941.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/67343023092.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/fujebaramalagivumi.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/kigirivodotebex.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/84704630742.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/36246332029.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/82458603376.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/74089352779.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/37193544660.pdfIn PDF document text
    • http://esen-life.com/userfiles/file/97913018872.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/suxonabusijeminivokojami.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/xexawunovugulanodawe.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/ginodopu.pdfIn PDF document text
    • http://sipsak.nl/userfiles/file/golimepejidon.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/82577329181.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b50919e183---bopak.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/jafewabuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=10+lines+stories+in+englishPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC665 10304 bytes
SHA-256: e24db0eef36dd64870cfeb6d965354bc9d5f5a3039572b12d506541c0f0cc09e
font_02_sfnt_off0000dd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7D 16828 bytes
SHA-256: b4cf8a3b6cd2215f7621809bfb93b58f6ffad3781d9fd5c8e9189d228c810afd

Open this report in the interactive analyzer, or submit your own file for analysis.