Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f0577206081557…

MALICIOUS

PDF

68.6 KB Created: 2021-10-01 00:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20e8b0c224dc2d40e9eeaf82268cd3a1 SHA-1: 951501d2b61b5aa927aaf0800b49466715f98db0 SHA-256: e2f0577206081557bccae44843317221d7a24d740e29f4effcd48b6c1f129441
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the overall structure indicate an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/uplcv?utm_term=show+me+offline+games
    • https://cabsfromheathrow.com/userfiles/file/25803885389.pdf
    • http://self119.net/upload/userfiles/2021/09/files/210912015107.pdf
    • http://novo-foto.ru/ckfinder/userfiles/files/vodakamufibadivozo.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613db5a84ddce---90023783295.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613ece0c41cb6---7055682721.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/3900a932e6f18d30e461789dc114198d/zobuvawuretamijetoba.pdf
    • http://oa30us.com/userfiles/file/22246112474.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4308e44f7---xizuz.pdf
    • http://matkinhantai.com/luutru/files/komarokoxobivesik.pdf
    • http://gadkowski.pl/repository/filemanager/file/78225322981.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614efe4edb9b5---77763180557.pdf
    • https://steammining.com/userfiles/file/mowulafedu.pdf
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/pavajab.pdf
    • http://myoffice2561.sesao33.net/UserFiles/File/66847536164.pdf
    • https://kopari.hu/files/file/solukipanozosupovoxita.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce5d737644---nifegovomezul.pdf
    • http://akinmedical.com/uploads/file/46171824734.pdf
    • http://gartenstadt-apotheke.com/userfiles/file/40244506092.pdf
    • http://ivankotov.ru/img/lib/file/99931906999.pdf
    • https://easternresources.net/ckfinder/userfiles/files/44719496619.pdf
    • http://alda.pl/ckfinder/userfiles/files/polinexi.pdf
    • http://www.jasolasia.com/image/upload/File/fopavisopamos.pdf
    • http://tc-antey.ru/uploads/files/29715795696.pdf
    • https://relans-nn.ru/images/docs/file/53314621373.pdf
    • 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_off0000af07.bin
eeb58f78e315c68f3fd3fab98f46549a83770543cf2d45453f2f0864a1a81af3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF07 15000 bytes
font_01_sfnt_off0000d4fd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FD 16792 bytes
font_02_sfnt_off0000ed14.bin
c542675990fe00470ab0d31dafe4df069125745e30a575be306d4565cd60ba1c
pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 10624 bytes