Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebabf64c5b42ef7…

MALICIOUS

PDF

76.5 KB Created: 2021-09-25 03:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c560ff8d27b87216b6f37f3afd3b1f73 SHA-1: 005c9b5e7c3eda9385fbfb4e8928fb7ec57ce143 SHA-256: 9ebabf64c5b42ef7b5282c0f9bc18dc6e3e0c8b9c51b6c2a8dc7654642b2f78d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress uploads and disposable hosting. These links form a link farm, likely intended to redirect users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • 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 http://debeight.net/UserFiles/File/xefife.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/c5210ad233d954d5cb4bdf0cce7c0aea/fafejinejokenewetalamisiv.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3e4c4f64e---76880749506.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614bf3292ca0c---87729428429.pdf
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/kiseripep.pdf
    • http://amy-tsai.com/images_express/userfiles/files/63205432932.pdf
    • http://pataibicaj.hu/userfiles/file/90211703747.pdf
    • http://c2ctrading.org/cms_upload/files/33407935265.pdf
    • https://1000families.eu/userfiles/file/razowadu.pdf
    • http://erh-hu.com/userfiles/file/furabalatufamezawakaxevav.pdf
    • http://xn--xhq021fvrwdth.com/d/files/69652139705.pdf
    • http://tamtamphat.com/upload/files/75443477243.pdf
    • https://shiksha24.com/userfiles/files/63231881236.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16136261c599a4---28342232970.pdf
    • https://shoppingplanet.ro/ckfinder/userfiles/files/94172260320.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614cce3c46f72---28054107343.pdf
    • http://hytechcommunications.com/userfiles/file/tamipotubodarojamafemuge.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/80ede388b55eabc2ff5df58589f80923/12144793664.pdf
    • https://mavachhaiphong.com/upload/files/79932235066.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614546f892edb---xenakidadusibixaberira.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+turn+off+the+autocorrect+on+android
    • 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_off0000bf66.bin
2f8bc1e36ae56ce8aa0b28768c43b995ba6727eeb336d0fade06a984a832a06b
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF66 20260 bytes
font_01_sfnt_off0000f468.bin
c669f503ad6f4af89370c869595e820750c6c92ded254423b47477341bd9e32b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF468 10536 bytes
font_02_sfnt_off00010c5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5A 16792 bytes