Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeda3e4d8ba934c6…

MALICIOUS

PDF

80.7 KB Created: 2021-09-02 03:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4e2598b4df9031e2a0bf30164d2c00c1 SHA-1: 24955534b7224941839ad220123be7eea20c38b1 SHA-256: aeda3e4d8ba934c6278d0fd0a0cc50db763ad5c8a977bfb3ab6272b52a1ba1e2
96 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier. It functions as a link farm, directing users to multiple compromised websites, many of which are hosted on WordPress upload directories. The document's structure and the presence of numerous external links suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 5

  • 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://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/kl345qoni92ac0n8j5r3r8sok4/75083036884.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/damamafolino.pdfIn PDF document text
    • https://kurashi-kyoiku.com/cms/dat/upimg/file/50505489174.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/wixewubelebep.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943b39608d5---kokoxukozexoxamizi.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc773f87b40---jemij.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/1151c3c725e51913caf6dffd7fab04d3/moluxal.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/01aba88feb2723507e62ad6fb3b41fe5/3585953041.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/piwowaputilasuposav.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/28893905771.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/46203235640.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/9b7739a1fe4eded76f71df2407800259/34364116709.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ecb4c72932f---gusagesatomuwubasad.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/84198937218.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de20ea26fe6---37570817240.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1609251f86fa38---52284718485.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/v2dfuoml69rofl5hoklusdbebg/89587030418.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/nutakenoduzorogiwa.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/96973699775.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/wonobalemuk.pdfIn PDF document text
    • http://charivne.info/images/file/83464777562.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/46111381721.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/vezojesoredireluvudox.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5eec8d8298---46667180273.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/lf8k6sm89vvlg9nl0jp01r1ng3/66525721138.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/kak4og6njrm6dm1ft2549rm68v/64694347482.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=carriage+of+dangerous+goods+manualPDF 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_off0000d784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD784 17692 bytes
SHA-256: d94d2217cc9d8967259241acad3dbae99ede34d8f74873d21bcce4152d07e0cc
font_01_sfnt_off000104da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DA 10732 bytes
SHA-256: 5da044570eccdbe2d7479230e455093c67c3c2ce558aa821b758f973f74f9e5f
font_02_sfnt_off00011d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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