Malicious PDF — malware analysis report

Static analysis result for SHA-256 94403368202d7ddc…

MALICIOUS

PDF

67.7 KB Created: 2021-09-29 04:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 29416745cda374142a8d40e8a9388e58 SHA-1: 0d0d2bb1108147258bf1c9c110babdc4d245034d SHA-256: 94403368202d7ddcf0843dcb29d7ebc55b806fe8d46ce124e640cf4462222514
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to unknown domains, and is identified as a link farm on disposable hosting. This suggests the document's primary purpose is to redirect users to potentially malicious external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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 http://hophungvietnam.com/app/webroot/uploads/files/88705971199.pdf In PDF document text
    • https://bluza-shop.ru/content/File/85761727010.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/kofifubedoter.pdfIn PDF document text
    • http://stimatacasa.eu/userfiles/files/58279507801.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/mowarogalaxamutarag.pdfIn PDF document text
    • https://stvorki.ru/files/file/37918127106.pdfIn PDF document text
    • http://jadeite.ru/images/file/38923083618.pdfIn PDF document text
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/12615877558.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/20498832981.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/lezumomomunojakusamoda.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/wilinelinukilodasizu.pdfIn PDF document text
    • https://businesslife.com/content/files/15221049638.pdfIn PDF document text
    • http://www.forteks.com.br/admin/ckeditor/ckfinder/userfiles/Images/64171614102.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/34347582464.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc67a88693.pdfIn PDF document text
    • http://austria-ex.com/images/blog/file/54302985295.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/kefapovujif.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/sogizofikovepemidag.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/29407230160.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d2f8a6161---regakidusiwitunoxigo.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/70003455651.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=appstorevn+android+apkPDF 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_off0000abde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F0 14412 bytes
SHA-256: 449171a6601c25a838b1390cff50e1650cc43ec858a206ce78108a03f2b04108
font_02_sfnt_off0000e800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE800 10476 bytes
SHA-256: 7f5e7cde31498a5b5a5d1ed2a370e9be0bd119806d78786ce39445612407b725

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