Malicious PDF — malware analysis report

Static analysis result for SHA-256 80eb9e5349d5c88c…

MALICIOUS

PDF

87.5 KB Created: 2021-07-02 00:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6e4edd9dc1c48b7692b2deaaa6e38237 SHA-1: 4d950638dc6ebd36e09cfa6684d4984c6e645898 SHA-256: 80eb9e5349d5c88c163b92351bb034c71d7d6f00b98a188b9c4dbd2aaa712cd3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Multiple heuristics identified the PDF as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting it's used to redirect users to malicious sites. The presence of embedded URLs further supports this, likely serving as lures for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/8c582b794065b748d5b8793a7edfebd0/92327617562.pdf
    • https://murtenhof.ch/userfiles/files/kamiretepitami.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/f6ba9defb738cd6e21a72360d4c7e3dc/28196139374.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/n5rinr65l71ta6lh00f2koql20/beber.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-19/20210519053740251608.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160832b61614de---1856729462.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/50cpc9q0okkpm914suie0l7tnc/29238526749.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/bvbpo3mgen4qaeulb5ruohthge/65956415947.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/kccpsuddhao0umsmi15f7dd055/modobimokovadukavabatu.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/3ea2a21fc301089fa6fc430e84c1bea6/57559836854.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/fa9cfe70fde132424196c75ba34c12d2/baxupuzeregotemi.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/9d1acd39188f9f18fea03cf374ffc1d9/zozozinudew.pdf
    • http://al-bandak.com/userfiles/file/nobeb.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/0frrcoqrd2vd3jg2ho01fgq70u/lutetijonivo.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/16350e5c9c1516f56fbe9e67941213f8/wowobikaboxiguru.pdf
    • https://vaitinhdien.com/app/webroot/upload/files/31827034299.pdf
    • http://klimagra.pl/images/wysiwyg_img/file/direnoxowagazenadow.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/b7172b5aec8dfd7c53cbd371be94c42f/xixerik.pdf
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/7a72fc25ff6a853dc42d25a736c6dab3/kawal.pdf
    • http://littlepearlbooks.in/data/eimages/file/27349267273.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb2f255c56---19542260567.pdf
    • https://publicbridge.pl/userfiles/file/57400659274.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/9tqcb393ic245nl16a66oegrvg/52474250002.pdf
    • http://konstruktor33.ru/app/webroot/files/files/ninaxezizemuwi.pdf
    • http://anhbanglaw.com/userfiles/file/97489383466.pdf
    • http://annandale1963.com/clients/69704/File/lolotolus.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=chetan+bhagat+five+point+someone+pdf+download
    • 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_off0000ecf9.bin
18dcc58a59b9a4d3f42e1ea80fd0c8472a25c4f9bacbb376f865a1c56b52e205		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECF9 18728 bytes
font_01_sfnt_off00011e87.bin
a314111d776ee55e59762ead0818c208a3ba9476c2ecf2cacde44d37400f568b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E87 11168 bytes
font_02_sfnt_off00013821.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13821 16792 bytes

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