Malicious PDF — malware analysis report

Static analysis result for SHA-256 697a9022cc8f1935…

MALICIOUS

PDF

64.0 KB Created: 2021-09-23 17:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: d2ea8c3cb37132ebdb1eb4e75f514e2a SHA-1: 5b8a6bd26746ccbf11710b05fcee7d446df718ff SHA-256: 697a9022cc8f1935e9865d8fc6497048e29baf2d4ad69338f22a29c71f4638d7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to obscure the ultimate destination. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8532

Heuristics 5

  • 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
  • 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://giyimkent.formenemlak.com/upload/ckfinder/files/78921809079.pdf In PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16145df8804137---sovewusitivunezevadogixiw.pdfIn PDF document text
    • https://mkontakt.com/dat/file/8977293495.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/maxetatisijilixazug.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614277091d1c0---35341593753.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/68341063691.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/94364244266.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/jubozurenovolusodaxopiva.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/68248100219.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/b9952de263f69153ffc56b5396c9b6d1/zoloredud.pdfIn PDF document text
    • https://tauthuy.vn/upload/files/40546042459.pdfIn PDF document text
    • https://southafricapools.com/contents/files/86694085443.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/kemewos.pdfIn PDF document text
    • https://casalindasbakery.com/ckfinder/userfiles/files/48125563240.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/segedonoseziwejetox.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/fugemed.pdfIn PDF document text
    • https://mchs.kz/userfiles/File/kunupexemebegalugu.pdfIn PDF document text
    • https://alkirbilaw.com/userfiles/files/78941314575.pdfIn PDF document text
    • http://bastola.org/userfiles/file/buturisiretu.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/cad324ad4ffb26f774a2fc2fb6e27219/25429468502.pdfIn PDF document text
    • http://friulanapanini.com/images/file/87960447330.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/f0223af548c037196a5f636f45e9f9e6/fovot.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021091820204898.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161433d92e1ef1---94165051320.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/59044374209.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210914075918.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=data+structures+and+other+objects+using+c%2B%2B+pdf+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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