Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0f8a0c80029ebc…

MALICIOUS

PDF

109.8 KB Created: 2021-07-12 23:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f632ed660a89ff50efb777f14614014 SHA-1: bdc5933e1abe5c2fd93120bdf2e2988648a2797b SHA-256: ee0f8a0c80029ebc14ee3bba8d92c199e2256cbba87a1dd5adca9284a7fbfd2e
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, 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 delivery. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/516f95372a733c6dbfd3f893fefedfe1/95883821932.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/231j7edqd4njj8bid1l09l445o/53303312202.pdf
    • http://microsolder.hu/userfiles/files/tojow.pdf
    • https://chiuman-hk.com/images/file/921372402.pdf
    • http://lubrifianti-auto.ro/files/file/91975998701.pdf
    • http://drapa-technika.cz/UserFiles/File/24056145011.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/4ae8b3e7fdd7238d2a5514385a81ee0c/ginufuk.pdf
    • http://capital96.com/userfiles/file/45361812274.pdf
    • https://lexcyberia.com/userfiles/files/3392091608.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160718b16d9b06---jubeduviwitebakonuxofikiw.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2c34de7e8---92022610158.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895c2f4e5b5---warela.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b87db8a480---15350452947.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-7-5/20210705145431848975.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160805b55ce99f---82592192138.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16083cc1be9363---tiditevun.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/152c35b22eb092de41ad432090b6d53b/94333462379.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f114473c11---34722331438.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5fc5aa628---ninerilubixevisuz.pdf
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/rodedamubojofe.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e50dcb3cb47---danomupije.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a77351f15cc---62255900348.pdf
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60971930927.pdf
    • http://omgmediatank.com/userfiles/files/10636445844.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=middle+cerebral+artery+territory+infarction
    • 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_off000149f8.bin
9c1fb88c4983eafb6f4d5755e2c75b0c1804b02f7a16d12f0939d893950aca2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x149F8 19320 bytes
font_01_sfnt_off00017951.bin
2aa1c8d8176433558664defd4eea80a983a6c82078408585afbd28fa7ed77874
pdf-font-stream PDF embedded font (sfnt) at offset 0x17951 10548 bytes
font_02_sfnt_off00019173.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x19173 16792 bytes