Malicious PDF — malware analysis report

Static analysis result for SHA-256 964cee37aa8b7b51…

MALICIOUS

PDF

79.6 KB Created: 2021-10-06 11:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e7cfcb9a68d5b3648f8e495816893844 SHA-1: d67e58e690b7ac78a3f8975266e367f58f9aa6a3 SHA-256: 964cee37aa8b7b51c34b50f79172030ab70b3f51c3b3297b9f6c59975e7477dc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The file contains numerous embedded URLs, many pointing to unknown or potentially malicious domains, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.pharmawell.eu/ckfinder/userfiles/files/nibepi.pdf In PDF document text
    • http://vigova.com/Images_upload/files/93648254757.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/11284159802.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/13068611182.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/51632494336.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/2976543851.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/77565086239.pdfIn PDF document text
    • http://coconut.hu/userfiles/file/lexudofek.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/xasovemajitifat.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ee354e79fd---29215587204.pdfIn PDF document text
    • https://blugarden.eu/file/44399014591.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/mifaxabawunotivix.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/reboxebebabomigoged.pdfIn PDF document text
    • https://izometal.net/mm/file/ruziruk.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/92854814894.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/xilopizifa.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/nowagivemu.pdfIn PDF document text
    • http://www.2m-france.com/img/uploaded/file/69248757093.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/57492356262.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/zatedara.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/90140251232.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/7596178786.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=baaghi+3+full+movie+download+pagalworld+mp4PDF 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_off0000d012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD012 18108 bytes
SHA-256: f0922adabb291992a704121778a67daf5d0baf837a94cf950cf0e0054214b00c
font_01_sfnt_off0000fe7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 11232 bytes
SHA-256: 45af80d4fcf46461909d7a964b86e86d2ed85ae0c73329e3b0d150a984df6fb7
font_02_sfnt_off00011888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11888 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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