Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c3a3bbbee71d7b…

MALICIOUS

PDF

76.4 KB Created: 2021-09-14 11:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a21433321fc33509908f57a63a226dc6 SHA-1: 2b4182288363852cb9011597e5ec230559f8c573 SHA-256: 63c3a3bbbee71d7b77afea1555764326153ad7eda50d01a6a03224e199bc628b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://garglob.ru/uplcv?utm_term=spoofing+joystick+gps PDF link annotation
    • http://sampoernastrategic.com/uploads/image/files/58810459398.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613acee8b462c---vefafamezuw.pdfIn PDF document text
    • http://halaljones.com/uploads/files/95780128425.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/zalefuretikewatameba.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/dutakixagunujog.pdfIn PDF document text
    • http://getem.eu/files/file/senuzoxanosovekapolem.pdfIn PDF document text
    • https://ms02bet.com/contents/files/76348421475.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/98943276781.pdfIn PDF document text
    • http://henca.com/files/details/file/2832446566.pdfIn PDF document text
    • http://xindeshiye.com/uploadfile/file///2021090222155582.pdfIn PDF document text
    • https://digiconelectronics.com/media/75941444647.pdfIn PDF document text
    • http://gamax-moto.cz/data/dokumenty/ratenisosotelodipevifewig.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/julofixubilogu.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613913a480af6---budeguwanasuxiwuranu.pdfIn PDF document text
    • http://plenerowe.kbo.pl/ckfinder/userfiles/files/4135062070.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/gedidomezikele.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/882702839.pdfIn PDF document text
    • https://menokatea.in/ckfinder/userfiles/files/36012882921.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/20056183751.pdfIn PDF document text
    • https://maria-galland.ru/files/file/91084211876.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/22704752046.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/25917653668.pdfIn PDF document text
    • http://exteractif.fr/pictures/2/makofenedeloxul.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/winakefo.pdfIn PDF document text
    • 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_off0000bce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD500 10624 bytes
SHA-256: 2e41b61da454fc34deb6a5505aeb1ad2dbfdc1720c0e8783ef704ef4c73f66d4
font_02_sfnt_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 20964 bytes
SHA-256: e3d86dcfb2a8f8f21af60a86f5ae88638ff64d6425a3129815a85e2a0b86dc01