Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee97019c4d0ceccb…

MALICIOUS

PDF

80.8 KB Created: 2021-09-16 01:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 95d95d76a953a40253c2f54f82fefe20 SHA-1: cfd37cc84a26fa6c51befe46b4aa169de94db001 SHA-256: ee97019c4d0ceccbacf1c1eef266669376b44a3b97032bd17a387bf9f832dd54
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites or disposable hosting domains. The embedded URLs are designed to lure users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://grafiport.com/userfiles/file/6457324231.pdf In PDF document text
    • http://dailythang.com/userfiles/files/26511454776.pdfIn PDF document text
    • http://www.valaisconsulting.ch/file/gegufovegodewudeda.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe338297a4---45552759330.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8b61eb73b---93991637709.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/bugomibedo.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/26833414169.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/20653098309.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/64318967978.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c972c72c6a---53644818107.pdfIn PDF document text
    • http://wedooverseas.com/userfiles/file/reporetemej.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/zazuworasajuwapovinejeni.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/beputojokabigo.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/39290896730.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/kafumuxu.pdfIn PDF document text
    • https://mchs.kz/userfiles/File/3500251328.pdfIn PDF document text
    • http://air-ned.com/uploads/files/bakataralakipepe.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c689519abe---82166738745.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/23606283152.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/59d1137d334a40e5f265c13219ae17a4/taxasimugikigufakikoz.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/41450177441.pdfIn PDF document text
    • http://vrakskodamnetice.cz/file/77535917185.pdfIn PDF document text
    • https://calienglish.com/ckfinder/images_store/files/65339613588.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=read+novels+online+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD928 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13A 17348 bytes
SHA-256: 78cc4354f1adf0701aeca1800e3a31c028441462d34bc00342128a4db1d27512
font_02_sfnt_off00011de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE8 10404 bytes
SHA-256: 52ef0531db0d5e86c766aa6e13caef0cd4de8209607810d4ee6f82d7ac7ecd19

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