Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86769a902270007…

MALICIOUS

PDF

86.4 KB Created: 2021-06-27 02:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86778d5d42a4635cbb68257ad76dcbd9 SHA-1: 290030d69e8481355751701114ed42822354fceb SHA-256: d86769a902270007486eec67b1cbe2c85b2958d223e7aa5882a75a2c8f78eae2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute malicious content or conduct phishing. The document body is unreadable, but the presence of numerous links on potentially compromised sites indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://alarcon-v.com/editor_upload_image/file/9823633798.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/1cb4f73ef7777cde2450be3640cb711b/5388693727.pdf
    • http://studiotrusso.it/userfiles/files/42670818874.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/58032c1d419c7e030ddf27bfb186b08d/xixarewogafawaworuve.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/e4445ms7i88qhvp9vnivoivfvg/lesagowaduvijepetavune.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c1b244f6c---jinafevojevesefitibupi.pdf
    • https://curryleafharleysvillepa.com/hang/userfiles/files/lowotirumemo.pdf
    • https://home-consult.lu/userfiles/files/20993798739.pdf
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68754849425.pdf
    • https://pet-fashion.ro/mm/file/zujureriximi.pdf
    • http://yoron.net/up/files/33294494812.pdf
    • http://maychamsocda.vn/images/userfiles/file/vorolalopemasesufuzun.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce091eb5f2---xizigomu.pdf
    • http://ibtaker.ps/userfiles/file/zodazoxaz.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160738fa4abab1---80999206672.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b193f035a---jatibupogozefe.pdf
    • http://neurooperations.com/ckfinder/userfiles/files/31170096707.pdf
    • http://auxerretv.com/content/public/file/dixijigifozavumejukoxoji.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d88b75a95c---ririgojavifitupusaj.pdf
    • http://biatlonbreza.sk/editorfiles/files/kariwopomexaduraxowuj.pdf
    • http://brukbet.com/user_images/file/23591377534.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe5ba91a5e---67595701360.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/c2v650nsqbjk93a141e60p3p6h/81817528761.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc2c5d9369---bekipadelemofexatibiziw.pdf
    • http://winterwonderlandzundert.nl/uploadimages/files/gekade.pdf
    • http://thuduchouse.vn/pics/file/donaruduwadafufula.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=of+mothers+among+other+things+by+ak+ramanujan+summary
    • 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_off0000ed4c.bin
fbef34de0767d127e8064ac35d75698aeed02d999979a59c4c5317e35034b88f
pdf-font-stream PDF embedded font (sfnt) at offset 0xED4C 17000 bytes
font_01_sfnt_off0001198e.bin
b5f938c43b9ea8abe7f36b6d667a7da35d8cecef09780b16f7b419279c90f236
pdf-font-stream PDF embedded font (sfnt) at offset 0x1198E 11216 bytes
font_02_sfnt_off000133ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x133AB 16792 bytes