Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7a17d649a1491f…

MALICIOUS

PDF

73.7 KB Created: 2021-06-29 05:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 8240d5bebbc4ba4f023115582334d3a2 SHA-1: 8ff9a252ab86b447d43e39b841f3f8d6997b9536 SHA-256: 5f7a17d649a1491f4c489e081351e0af5d89a2d6b5d961e988b694fbebb2f715
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It functions as a link farm, embedding numerous URLs that point to compromised CMS uploads 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 0.8282

Heuristics 5

  • 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
  • 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://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a7782413e67---57367381194.pdf In PDF document text
    • http://royalwedding.jp/images/blog//file/34950496457.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/43992502571.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/fokomepawerufufid.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210629032136_65357530.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/sizogikijajuwipub.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/54017252899.pdfIn PDF document text
    • http://3sdent.com/upload/files/29647603450.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/doxipebamire.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/38674475359.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160749700735cc---jaxudabikaxuwamun.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/1f605f129df3f46781553f2a5a0287b1/xuvaz.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/c4232e7b2ee83ab96dd5925fe5a2a9d0/60081022383.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcd3a7bf8e---89726033764.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/topaz.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/48852382047.pdfIn PDF document text
    • https://aspirans.com/files/file/fogosivezibel.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cf224ecc8---4244168422.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/hl5tdbruv75d86lti9t1hlkrtf/larususid.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/ziruposubofawodelamexefo.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870089c891b---pituzafuzivakiwagokokopek.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/rajilibikikod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=the+entertainer+banjo+tabPDF link annotation
    • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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