Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb519d7ae822be6…

MALICIOUS

PDF

146.9 KB Created: 2021-07-04 16:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f82235367c4ed7034eb53310fe140991 SHA-1: c3c8f627c1416daadf831c2004ee1280e7924762 SHA-256: 6eb519d7ae822be693503e05044dbf7a8bd33f1106fd5f0b7b1bda738f8e3f86
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to external, potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdc8a38844---kamimenumanukide.pdf
    • http://huile-de-nigelle.info/userfiles/file/bilanaliva.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/2c90b603091d6de11e6a8928dbd6d7fd/risap.pdf
    • http://bukharaalpharetta.com/sites/default/files/file/798854540.pdf
    • https://telenovella-bg.com/files/75131543138.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/3a2e08563ff2e4fae2353e799ab0f2b6/99459801206.pdf
    • http://boissee.fr/userfiles/file/5208653023.pdf
    • https://mangonebike.com/uploads/file/jamigofabonopuxubu.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/1hhmdj9aao5669pq0plheo58ch/lodenosebolekakuro.pdf
    • http://xz-brand.com/ckfinder/userfiles/files/74172836272.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/cd11710ceaa63624df616107eb26efa7/minipinozukigijokebi.pdf
    • https://bloomlight.pl/_bloom/file/sofoge.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3e4f46ba0---63248226301.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2df05c6c---dapudokaxugavowegezug.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/ca270522cae4c70d541b4aa18d378ca5/47709840617.pdf
    • http://alexhofford.com/temp/files/file/13723065596.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b467e14938d---zefigituroredixu.pdf
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d6b8fbc2---nokekiwabidu.pdf
    • http://ash-graphy.com/userfiles/file/89197581368.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/jvel982ptt6i07oeof7bt5ofin/76639602085.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/047b9550841c7f863e39a03626341303/zapodubosodezikurik.pdf
    • https://alate.org/admin/fckeditor/editorfile/38046085961.pdf
    • http://s-privod.ru/userfiles/file/36804058293.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e677158bd---22760444082.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=through+the+looking+glass+white+queen
    • 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_off0001d5d5.bin
494f6770f8bbe3d8ce653d5f4321fdfc01fcd030fa0cbcdbe41012d9e3fe589e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5D5 10776 bytes
font_01_sfnt_off0001ee61.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE61 16792 bytes
font_02_sfnt_off00020673.bin
1427ad97b58be5e4c008804afd356562297e41b17efefdbe71ef14f0dbad9bb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x20673 19892 bytes