Malicious PDF — malware analysis report

Static analysis result for SHA-256 0463237b017b5e15…

MALICIOUS

PDF

94.0 KB Created: 2021-07-03 19:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c909a24e74ef603ea90316f234f75ff9 SHA-1: 2842020f407b8d472dc0c20503a9f8f2a9dfc43d SHA-256: 0463237b017b5e152319c8d19687e154338e1e1764dea1b4683acf02a63a811d
196 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it contains a link farm hosted on compromised WordPress sites and a lure to install browser extensions or updates. While no scripts were directly extracted, the nature of the lure suggests potential for JavaScript execution or exploitation to achieve its malicious goals.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160bededb0ab86---lapevuxamulutimopafenovek.pdf In PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/dece6859b32ad68874f14d916e28a862/saxofinolejusimizoremox.pdfIn PDF document text
    • https://webmenuplus.com/images/file/74440526517.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/e4kht2kl4a1h0kqrr8nt1b36ab/venifivepaluxonado.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5cb9a4136---40399950220.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/5458d3c01d2394cdaed26b7a062a7986/nugewisodewitirekur.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/zujewatorabexifuvorosoteb.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/fbbsu0bdrecqggsrg4g4mhla0m/58542252028.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/2ed4bc4f7dcf0effdb5ee28004e37be8/60249926564.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/16368083697.pdfIn PDF document text
    • http://usa-ex.com/kepijoxexolul.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/24026315353.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/46cd69f1059bf4fcabb1aa5b7f6a0803/xipaxupifutitifopedasiji.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/58915930840.pdfIn PDF document text
    • http://charivne.info/images/file/zitipumiluxefuwit.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/giwulekem.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/45287185529.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/4acbd97772cc09d1d31fffc6b3137722/redubopabexobojadukiva.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/2f189aaf2c6d2ac857d01ecce2896e2d/megako.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/37912684657.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/2007112509.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=flashes+in+right+eyePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF8 10360 bytes
SHA-256: a2b9244e9f05cfe01a34840debaba552d62ed4f4ac9a767417478d6dc7876c30
font_01_sfnt_off00012749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12749 16856 bytes
SHA-256: 3ab6b192e6adfc9064816f03c04f1ffaae8ebfc225a92a0ba334a9222c2802ea
font_02_sfnt_off00015311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15311 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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