Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10373081d1d5b3d…

MALICIOUS

PDF

86.0 KB Created: 2021-06-30 09:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 43d87f3a0b51705a3c2a3e80995dff92 SHA-1: f6f918b3b2e393d322e9dff71471401eb9b02a6a SHA-256: d10373081d1d5b3de8a1aa593b51f985949367ae81f1aa80c2f6653ad9711304
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1071.001 Web Protocols

This PDF contains embedded JavaScript and multiple URLs pointing to compromised WordPress sites, indicating it's designed to redirect users to malicious content. The heuristic firings, including ClamAV detection and ML classification, strongly suggest a phishing or malware distribution campaign. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://coretry.ru/uplcv?utm_term=file+for+pandemic+unemployment PDF link annotation
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e422d88e6---popuvowilaboloko.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c941234f57---rirudilojawolab.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/gozorenefubaxonini.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/gomirijetef.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746df151cb2---40838850850.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/kisom.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6885852509---piwewovisozuvimudo.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/2230005280.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/74854296124.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/70574401988.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8i0guh35779trvupma5f6ol4b1/zawebasaji.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/23e4e20d29977fd5444269120b64903e/5027192829.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/88960313683.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4fc5e1de4---nodogitisuxetofazip.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/bilisonenepanubafigemip.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f820b7ebce---70057135564.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/f984f0081d057fbd6d3379b2a4e7ca72/ravotedegox.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/sagf78mkachv9rja9ggg1uuckh/95804084983.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/b6ba3ddc37afdd61fa1efc214d0448c7/56350269772.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/484433048.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160848cb109da8---kokotenekazogudakon.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/9b671abbda3a2e5a79ccf00a3bb7769c/89077919918.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

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_off0000edd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 16840 bytes
SHA-256: 0a92ed7463e92b7306c78f113f2a79b009c25837f4608bf45cf06d30a6beedeb
font_01_sfnt_off000119db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F2 10804 bytes
SHA-256: 7901f306bfb583beb762416cb643cbf499334d8239cd6101146915d9914e7e82

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