Malicious PDF — malware analysis report

Static analysis result for SHA-256 50606f6f76a8fbfb…

MALICIOUS

PDF

94.3 KB Created: 2021-06-25 16:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f9fb6700e0e234abda3fc2a933db7849 SHA-1: b96b596065ab47072e96697a36257b7805a7e692 SHA-256: 50606f6f76a8fbfb049197235bc2be5423d07b43a257a0cf12ee98c811b8088b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/8858fa1f01af27813d82e33095eea8cc/tibitivulesax.pdf
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/vetijokeduk.pdf
    • http://choinka4x4.org/cms/files/file/74153301179.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b50faa61571---wuletimapejojavadubam.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105081731435056.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d24e48457---29280969453.pdf
    • https://cowichanmusicfestival.com/userfiles/file/69926775915.pdf
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/28931904202.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4ecf124bc---siwakelexopozegarudubi.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92e92efdb4---6425177002.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/96g90ap1bgh8f287dqk4v7dg7h/79584331937.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/f6ddb77d9fdcc7e6cef64dc615d85ff5/nisimutoj.pdf
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/tofubiwanozol.pdf
    • http://lighthouseofworship.com/clients/44803/File/3991612447.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=angular+tree+component+drag+and+drop
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea4d.bin
247086c382e55921312bf4660d566aa434a4fd47fff9a13e8be24270a15c4e4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4D 18848 bytes
font_01_sfnt_off00011bcb.bin
4f523e11d594c11afa77c369c00dea81168357657286c4640478b8de34bd2d65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCB 10680 bytes
font_02_sfnt_off00013420.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13420 16792 bytes
font_03_sfnt_off00014c2e.bin
6d2aacb65d33ad92a8d3c4c19bbb71661865262cec56bd9314122d9ce031e660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C2E 10560 bytes

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