Malicious PDF — malware analysis report

Static analysis result for SHA-256 f35031418097fe40…

MALICIOUS

PDF

74.1 KB Created: 2021-09-16 23:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d7f55c204c90067e9341b01cc1e05b36 SHA-1: 9ddae2ed2785982e242cff2ae824931b489760f4 SHA-256: f35031418097fe40c36113a3433f2786c93162f243066e9366a0de9a957affe1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. No scripts were extracted, but the PDF structure and numerous URLs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://khyatiinfotech.biz/ckfinder/userfiles/files/bowetonotesexopaj.pdf In PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/mepivajav.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/pekawokelofizifatupew.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/98564662325.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/zefigefuvolaliguzakiv.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612fab889d111---motujipevuxibowiger.pdfIn PDF document text
    • http://mytrangroup.com/uploads/userfiles/file/vorifuxidag.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/86167627669.pdfIn PDF document text
    • http://vo23.ru/upload/file/46181678997.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/72373530551.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/57534492844.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/bulukilula.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/54705706123.pdfIn PDF document text
    • http://jump360.co/upload/files/20210907050317.pdfIn PDF document text
    • http://diencongnghiepvohoang.com/uploads/files/wajasumesu.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/xuguvel.pdfIn PDF document text
    • https://maconlux.ovh/userfiles/files/kowefori.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/39309805472.pdfIn PDF document text
    • http://enkepharma.com/upload/files/fixeje.pdfIn PDF document text
    • https://nsstore.mx/ckeditor/ckfinder/archivossubidos/files/8029258779.pdfIn PDF document text
    • https://mmeasar.com/mmeasarfiles/file/lavodowep.pdfIn PDF document text
    • https://geniodelweb.com/file/84086431889.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/gam8ltvuo1mgdr03gsc8h24sv7/dujarixewafaw.pdfIn PDF document text
    • https://dellrein.ru/content/file/pasefenuxijijukojawarod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=o+level+organic+chemistry+notes+pdfPDF 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_off0000be6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6D 11272 bytes
SHA-256: c3af6bab346faa1783b70d322cb691f6538ec427f285a015e863338e6310fc0b
font_01_sfnt_off0000d887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD887 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF099 16580 bytes
SHA-256: a4af7eb4d9d1a84822c8af34a2baad53f5109da3e64359abdd95d8d438354f29

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