Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd97a3669376deb…

MALICIOUS

PDF

73.5 KB Created: 2021-06-20 11:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: aa0e7d79a8ecb54139f05b6dc006fbdf SHA-1: b25fc355d059dc548c02c3debd1b0517eefff2b1 SHA-256: ebd97a3669376deba71ffb497f6924057c931d7b6a6cb8718e68ecb2f5276c54
154 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution campaign. The presence of a "wall hack" lure in the document body indicates an attempt to entice users to click these links. While no scripts were directly extracted, the PDF structure and link farm heuristics strongly suggest malicious intent, likely involving the exploitation of user curiosity to redirect them to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6045

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://actor-conseil.com/files/file/kunufelawibuwavuk.pdf In PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/62550068836.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/0ag8clqverqo5dn9m0k8mqna53/40455004507.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/e0kojn5kefeqvtc8ch3n01fhd2/617698948.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/nafigavemasanagoxaman.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe90b5faa3---56397248572.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/46122221264.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/3tq99uk6b7gnnlq9vrrv8vr1p2/dumogugufuwuti.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/6691607532.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d4545738a---29203621021.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703bae00518---voxuketidikuperojiji.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/67667353742.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/23017061626.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=mw+wall+hackPDF link annotation
    • http://scripts.sil.org/OFLIn 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_off0000d75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75A 4776 bytes
SHA-256: 421bd22bb233b2d2ead73a5ec2856f4e5734955b7ebe3680b99ed3e33b3372de
font_01_sfnt_off0000e7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B1 12056 bytes
SHA-256: 5159945670b730ea6d57e7d99efc8ee88393cb6b4e3a495330b081b7e5eb2f57
font_02_sfnt_off00010f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9C 16924 bytes
SHA-256: 206ba1183a73779b9aa9595df8da0e7b9f8e7198c055c5aca96e073572277e9b

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