Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee89bc9ee24d332b…

MALICIOUS

PDF

84.7 KB Created: 2021-06-27 18:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56cfd5ee87011f4243b863718c96ef9a SHA-1: cda94e17d184d28c4f5eb08d3574d4ad9ed69ef0 SHA-256: ee89bc9ee24d332bb482016ba68f838dc74fb000bfcccdd221f07fb49acd5e2d
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is unreadable, but the presence of numerous links to potentially malicious PDFs hosted on compromised sites is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/6f04770f48bdfcae48ee0d937c49f84b/zusimojetegududefenodafof.pdf
    • https://clubsportedinburgh.org/userfiles/files/69253963528.pdf
    • https://gifarlcm.com/upfiles/editor/files/42512987193.pdf
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0472b4841---60359318478.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2b50c8e28---23678948348.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/e021d41f96210108b36c57418f347e1d/bavisezin.pdf
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/dolurujekazufaxer.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160791317c31e9---38332360094.pdf
    • http://aygroupmuh.com/image/files/gaporavumeras.pdf
    • http://gancza.pl/userfiles/file/13031327297.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/c0a873049e5a7bbcaeadb894687ef1a2/gutofatadubutuwipi.pdf
    • http://altelaw.com/uploads/image/file/kakuligubopamuva.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a38f6e0b9---57127260126.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607db9187c9fa---vovujimer.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3145f2c439---tuwuvaropoxadenatul.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/5ceb9f2eab0f08cbee9e9e0c8dc89121/felifimexotopomatagodimi.pdf
    • https://upbilbao.com/ckfinder/userfiles/files/38941727987.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a8eeca4e7---kapuvubuvotatenasax.pdf
    • http://irk-yoga.ru/upload/files/80463466082.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/8kamjhbfk4tq7jm7rghh766hh0/97006375951.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73bea5f301---70241842142.pdf
    • http://vralumni.com/clients/7/71/71e0d721b250bdad3664bf54e70089ab/File/katifivikaxirifu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=legal+and+ethical+issues+in+psychiatric+nursing
    • 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_off0000e8b5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B5 16792 bytes
font_01_sfnt_off000100cc.bin
56f1b8f25bde02cb7a03f4ef5c415025a97de357c6c8ded3c3dfb7c4d7b01daf
pdf-font-stream PDF embedded font (sfnt) at offset 0x100CC 10844 bytes
font_02_sfnt_off00011982.bin
07e785aa22829f2678808fa4fa929e3de76f599cddd8a3b672222f2d3f48cd72
pdf-font-stream PDF embedded font (sfnt) at offset 0x11982 16924 bytes