Malicious PDF — malware analysis report

Static analysis result for SHA-256 802eb0d70210e420…

MALICIOUS

PDF

79.8 KB Created: 2021-09-08 23:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b5974b94c5e41680eebbfd94088fb202 SHA-1: a529e8eadcf0f9209e3bb4f44309355826074245 SHA-256: 802eb0d70210e4209d19c39d0007d80261e7dfe3a7ff390741651676fae04f9b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to potentially malicious files, indicative of a phishing or malware distribution scheme. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggests this is a link farm designed to host and distribute malicious content. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fotografiafrancescosomma.com/userfiles/files/60415138851.pdf In PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83174475501.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/voduretemajesejozosu.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/87565142393.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/40611376186.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/murixevizu.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/35600862264.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/30282022620.pdfIn PDF document text
    • http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/penazutijusenoxoje.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16133b1826a09d---bijorefepuxazexosaba.pdfIn PDF document text
    • https://ivanamihic.com/files/61166176065.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/79539677935.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/zijiwimaxakabi.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/95810024436.pdfIn PDF document text
    • http://caythuocnam.org/images/files/nevom.pdfIn PDF document text
    • http://lecieldesandes.fr/ckfinder/userfiles/files/duniwepivupagaviros.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/49763618692.pdfIn PDF document text
    • http://wonderful-foods.net/userfiles/file/77428184419.pdfIn PDF document text
    • http://ekorepetycje.eu/Upload/file/wonagirogapisepevimiw.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/26829969201.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/45053460401.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/soxapoxuvazurikig.pdfIn PDF document text
    • http://entrackintl.com/uploads/doloximogonix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=brawl+stars+download+apk+latest+versionPDF 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_off0000d025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD025 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE837 18864 bytes
SHA-256: ec9004e51372cda0bc1ccf67986799a62581a2fcebd05086b3d7d90d6dc968d9
font_02_sfnt_off000118c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C6 10680 bytes
SHA-256: de168755f118610a3ae31e9bd8b1cf2f047092b994d05600479a3a567734b8e9

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