Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ae75f1ad62c172…

MALICIOUS

PDF

67.5 KB Created: 2021-09-16 02:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2840683a52904cf7c1f51715dade0c1a SHA-1: 10d58ef1f12080ac3d365061e5ead7c730146fff SHA-256: c6ae75f1ad62c172c1cb8314abea99d3aa03fd88c328415c40a550a4b9e4839b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an embedded JavaScript stream and numerous external URIs, many hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content or download further payloads. The document's structure, resembling an image-only lure with a clickable element, further supports its use in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=download+mobdro+on+android+phone PDF link annotation
    • http://ggmtc.net/userfiles/files/30935519901.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c807aa2d57---banujoxizuri.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/posoxotaxunutixuz.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/adrslrc37u7vd73e1lfac2uqls/ribejinivuwiwajuse.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62812200152.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/bubuvowazenamizipazum.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/6117427207.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/divavevamigajiparobajoli.pdfIn PDF document text
    • https://bwhe.in/ckfinder/userfiles/files/mapikaxogemeje.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/22173155206.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/gijafofunume.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/36550707409.pdfIn PDF document text
    • https://gazeta-msp.pl/user_files/File/newinipekupelulena.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/pesaxosuworofezomejadure.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/95542946022.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/kokobavasariwavirizo.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/6747204222.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee72e77dcf---vipegigulutu.pdfIn PDF document text
    • http://casms.org/atts/news-files/file/29545320255.pdfIn PDF document text
    • http://space-edge.com/upload/files/vimofokelazoreluwuzobejad.pdfIn PDF document text
    • http://citranco.com/users/files/jakopalixexenewawisupelaw.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/wiwijixobekisajotitepesi.pdfIn PDF document text
    • https://bursac.net/userfiles/file/rojatipafagavoxoredezot.pdfIn PDF document text
    • 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_off0000ae24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC636 14060 bytes
SHA-256: ee37fb53c1a2aa2ad88db4b1705820afbc3ceb73081b78aa387b825f1ac74142
font_02_sfnt_off0000e938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE938 10620 bytes
SHA-256: 9ad0107a5f1e3e0baa642273b1777b766c08c4c6c7ea203830f2d3c9fa0eb439

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