Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6cb7e231d96092c…

MALICIOUS

PDF

72.6 KB Created: 2021-09-19 13:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2aa1d5cd2d161846cf568c86f2f9b20 SHA-1: 0096a0fabd3d8ab66a1755a2b22a822cc2e5e6cf SHA-256: d6cb7e231d96092c81d97dc7ed381fe950b915cfbfeeafb51deea7516b78cce9
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a high heuristic firing indicating it functions as a link farm. The ML classifier strongly suggests malicious intent, likely to distribute malware or facilitate phishing. While no scripts were directly extracted, the PDF structure and URL patterns are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 4

  • 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://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/32112970816.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133e825a0d14---7531131598.pdf
    • https://tedesco.pl/userfiles/file/38033094223.pdf
    • http://cmtdental.com/upload/ckimg/files/99562401929.pdf
    • http://wamer.org/userfiles/file/naposurerigo.pdf
    • http://dealershop.es/camarasegovia/userfiles/file/30852893108.pdf
    • http://kaies.cn/upfiles/210902031627451254b507mo.pdf
    • http://drcleancenter.com/uploads/files/202109051119251409.pdf
    • http://logenamerica.com/userfiles/file/3443662366.pdf
    • http://rklatex.com/userfiles/file/99001833616.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/kufekerobazarazujobas.pdf
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/49501444461.pdf
    • http://novena99.com/uploads/files/202109101825094526.pdf
    • http://musorcentrum.around.hu/files/article/file/dawekotubiwis.pdf
    • http://crestviewshopping.abwingsmd.com/uploads/files/93461479221.pdf
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/13085128201.pdf
    • http://seamcc.com/UserFiles/files/jesadamiludadosupu.pdf
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/kulini.pdf
    • http://phuquytravel.com/nguyenvanlinh/files/36576714650.pdf
    • http://wenyanchem.com/upload/files/41426212183.pdf
    • http://gps-tw.com/CKEdit/upload/files/22301254010.pdf
    • http://net-marketing.hu/images/files/foladozemutewe.pdf
    • http://hmed.vn/upload/files/lonod.pdf
    • http://bonezi.morefriendship.com/upload/files/53368040525.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=fifa+19+obb+file+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b98e.bin
450b6b9b9ee362dd2415570c22174b61ef5cf1d6a21f2636473021d4e578ce6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB98E 16728 bytes
font_01_sfnt_off0000e535.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE535 16792 bytes
font_02_sfnt_off0000fd4c.bin
be77a8083644dea86dc0c90252e1bdb0d5dbc9b608b9d94a729e4a869bfb9437		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4C 10404 bytes

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