Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2464c1a341c40d…

MALICIOUS

PDF

81.3 KB Created: 2021-10-06 12:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4fa5c714546f849e9ed102c43972a10e SHA-1: 6375432a1e3dbc344d19dcddbab80df6ccc1fcaf SHA-256: 9d2464c1a341c40df1503606aedb120a5935827387d226401e23de89c0acd1fc
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects to one of the numerous external URLs found, which are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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://spakimthi.com/upload/files/patopeferu.pdf In PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/718705cf59e4555744fe4007f97fda5f/gulorolewag.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sigubexura.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/12531731237.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/58941467186.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/14625851806.pdfIn PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/suwulukefu.pdfIn PDF document text
    • http://shouce-image.kuchuancdn.com/Public/resource/files/mexus.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/98916492048.pdfIn PDF document text
    • https://pustelnik-budownictwo.pl/ckfinder/userfiles/files/remixuwevafa.pdfIn PDF document text
    • https://eetravel.net/file/5237170498.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/161327f74eca18---nesolo.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/56856829200.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/41568289616.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/tanujulipofufuseserub.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/96247310790.pdfIn PDF document text
    • http://nawoo.net/userData/board/file/2007034125.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/29268571509.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210923051951477.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/39211763850.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/72756984500.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/31927147786.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=quotes+from+the+handmaids+talePDF 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_off0000db25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB25 17216 bytes
SHA-256: 5581e22a202cf8d271b45439c891418a15501f005ab6dd83d63648e6034cb3ec
font_01_sfnt_off00010747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10747 10776 bytes
SHA-256: 2ced0eff23e9ea2cdecf3209c01fca7e10b4a44ac2d502ede8de88d7ab567720
font_02_sfnt_off00011fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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