Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ade0749e77d56f…

MALICIOUS

PDF

91.8 KB Created: 2021-06-29 16:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12645cb221f29fcdd32cbd33124f126b SHA-1: b2261a6989a7a3335f10b030390ab997e678016e SHA-256: 70ade0749e77d56fddca3fff904c4ebea08df49ec9f556df1f9b95bdc5eba816
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to disposable hosting and compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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://ahkjt.com/upfile/file/sufalutejonufewopi.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4f5b1c3e3---48465446939.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/ufpktqgo40f1p0hp6ml8m7igk7/10589612213.pdf
    • http://uticachemical.com/files/upload/files/sukaxodilalefatoxuzijo.pdf
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/fc3cbab6fca714ebd96b1ad75ed1dc1e/vorokefasunetexorasupilo.pdf
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/82891690686.pdf
    • http://ahkjt.com/upfile/file/wulafuvabexunobade.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd6bd4d02e---71044389651.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608247203d5ce---bigebisujuxemapafop.pdf
    • http://metaglas.kr/userData/board/file/24026315353.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad9d8deffb---bajukutita.pdf
    • https://genegurumiraclehealer.com/userfiles/file/ribagazogejewaxexoj.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2981d657bc---lexux.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/c5cf6350d8d046f808c16c084f22e3d6/rewewujazawitos.pdf
    • http://phuquytravel.com/nguyenvanlinh/files/jawesujofuputowu.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6576da0a85---97102124420.pdf
    • http://surtek.biz/image/files/20150104_124631.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f86c1e8fbb---72467006736.pdf
    • https://armagedonspedycja.pl/files/file/jefojitasetudufaso.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d4941eb90---17724032604.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/59c5e2ee415162267c9ec98d06a494f7/76033311207.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160722ede6c9e8---beloledomemamiluvazateti.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/c866097e1f28c66a76b6c66c7a094414/53607219443.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160773c28e99ee---25604792184.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da75ebe1fa5---mudop.pdf
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/petesifojedarigadom.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=good+reply+to+what%27s+up
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb1a.bin
2fd1564afe7ce47c83f0bec8f4a07da5221698c0239fdfa8d182dfa3fd20ed5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1A 17884 bytes
font_01_sfnt_off00011a3e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3E 16792 bytes
font_02_sfnt_off00013255.bin
ba695df25a9bea24785a30f06ecbfbcac7193c72070a61a47d196692a17d42bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13255 10664 bytes
font_03_sfnt_off00014b12.bin
d0e02ea597b059e12c640018e4c0b859d2fbe31b167f59dc9fd0dc6423c65742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B12 16488 bytes

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