Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8de8f32d0b4703…

MALICIOUS

PDF

81.6 KB Created: 2021-09-05 11:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8b5f7a37094d3d5c063694d0046575fb SHA-1: 1568648645944bc110b4420c0269a3322a856f68 SHA-256: 0e8de8f32d0b470340c084bea53450afedd5fc1ff57128bd6daf295be53f7b92
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate the document functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites and disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://parquessolaresdenavarra.com/userfiles/files/69205503880.pdf In PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/egqlb68pl302dekv52nq650563/rasigupotawevegawizolor.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/41514328801.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d48de1ca1---tunasuvumisoluwavokolelok.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/20849465958.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dde06a31f54---riruwoxiwupesoze.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/pupor.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/25551336881.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10324745385.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078408c14e8d---dubelavawisevuporaz.pdfIn PDF document text
    • http://slsnn.ru/content/file/32993865021.pdfIn PDF document text
    • http://toicodonlyson.com/uploads/files/sipow.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/penababarifo.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/fegamobepirasafetuzab.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/5594d24723e29846df07349e97bf6818/novezopik.pdfIn PDF document text
    • http://haihengpharm.com/upload/files/wukotipagobag.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16096d8a0587ae---81599153382.pdfIn PDF document text
    • http://newbiesites.com/userfiles/file/pafemenober.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/23d9d2494a3a2269a9dc9ec3f88e5726/29175678478.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/39227467316.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/denegexo.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/059edf16c19c426e85d059abe8feac7c/dikikazuxelafalosajoga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=mac+preview+pdf+editorPDF link annotation
    • https://tes-sys.com/uploads/ckfinder/files/20210713/16261258968047.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_off0000dd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5E 16964 bytes
SHA-256: 1d622cb68bc4e64b8a3dab5881ad4ae45fa20d020ba80b846bca4fc55e1ed323
font_01_sfnt_off00010920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10920 10440 bytes
SHA-256: 22f993653058f6d27b73d5b7bb3b5f4880e32564ff5009185384907cdf7d54d2
font_02_sfnt_off00012106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12106 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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