Malicious PDF — malware analysis report

Static analysis result for SHA-256 26fc520648344b84…

MALICIOUS

PDF

77.4 KB Created: 2021-07-17 04:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb68082ba51b725fc952ad5d0e8f828a SHA-1: 02c215ac753761ff0ba76b1650d96dff9a98a9bc SHA-256: 26fc520648344b84bff551e498a5d8ff31edee72c7364935d702b7f54d5fa94f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised WordPress installations. The presence of these links suggests an attempt to direct users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 http://ototavandosemesi.com/resimler/file/33210202385.pdf
    • http://consulcongress.it/uploads/assets/file/13659973879.pdf
    • http://kasargod.net/uploads/file/92608395869.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4433859d3---sonejulizuxen.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a05e73a9f5c---midisesariw.pdf
    • https://profix.fr/ckfinder/userfiles/files/87770486537.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/6fc9003bb5ab6776db208ac8ea92089a/69522969081.pdf
    • https://oumkua.com/userfiles/file/70201838692.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/pi860l9urlg5f6famou394a7d5/25074042008.pdf
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/44304521343.pdf
    • https://dhesient.com/media/27273263370.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/77ded5j60g8sjdn39g309lbdji/20136622482.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160833e1f2cf8a---megunug.pdf
    • http://cementfeet.com/userfiles/file/12812031906.pdf
    • http://praguetransfer.com/files/file/toxanofovefovagudet.pdf
    • http://manixcnc.com/ckupload/files/ledorad.pdf
    • http://kolesnikov.pro/ckfinder/userfiles/files/96546906654.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb63823d900---tivanodevil.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32ab7a4b76---xowikux.pdf
    • http://www.northern-japan.com/image/upload/File/16324151935.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c3c3b83a7---butafodofedofegoteso.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e9430730d---jefipikumejinujeronotux.pdf
    • https://osikovo.eu/webroot/img/content/files/gupiduzurakarowoxelekibur.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/f5034006a252656b4b5a8b62a39a518f/51857322212.pdf
    • https://yptea.com/data/fckeditor/files/26439689840.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbbae86733---11042204694.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=convert+mts+file+to+mov
    • 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_off0000cdbc.bin
f25dd209747eedecc4be5745b83b72ca6afc9912a86cda4abf685656ff6a72a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBC 16512 bytes
font_01_sfnt_off0000f8ee.bin
f5965536fa140358119f66be43e9b2761408a62b640a83bf6c805e9d57de297b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EE 10312 bytes
font_02_sfnt_off00011033.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11033 16792 bytes