Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f68a7b0d24d0af…

MALICIOUS

PDF

88.5 KB Created: 2021-07-18 10:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e5cb42bc70ec5f20c492f11561f6a06d SHA-1: f9213547fc2d64ac86d1197e9941ed74b59bad57 SHA-256: 12f68a7b0d24d0afac50acd323591a95f7c142c9ccce95a7b069797bf9375e32
212 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous links to potentially compromised or disposable hosting sites suggests an attempt to host and distribute further malicious content. The heuristic indicating a 'Password-protected archive handoff' strongly suggests the document is a lure to trick users into downloading and decrypting a payload, likely a Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kadh.kr/bobod/upload/file/wizezosovalexubojobamo.pdf In PDF document text
    • http://cn-polylysine.com/d/files/96941490735.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/pumixonorapufutubaji.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/39994509545.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/emft6kpkf12bvephf5kdjtcsn3/67016041256.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/22358269569.pdfIn PDF document text
    • http://glcore.net/ckfinder/userfiles/files/5868291758.pdfIn PDF document text
    • http://carscaso.com/js/upload/files/zowovi.pdfIn PDF document text
    • http://ligneus.hu/upload/file/97132337972.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/rofuvasezi.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c178830de31---pikekozikewalegiwulam.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/mipovedijavome.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/85129008268.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/todirixe.pdfIn PDF document text
    • http://trickorsuite.com/clients/5/5d/5d84d12f6f4dfd10bbe5497c884a5f3e/File/tijanarivogalepogunivaxij.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb47e12bf78---46632871383.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/76674135139.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/52575592061.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/ee99c4b891a72152dd41d675f85b81ad/89118689540.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/74178323448.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/lewinuvanilifiwis.pdfIn PDF document text
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/pozegawisovufaku.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/42240310389.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=counter+strike+global+offensive+wallhack+downloadPDF 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_off0000ea0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0D 11272 bytes
SHA-256: cf801903e6c58b38feee53811f8581b64908a44858da7fa6881052dd52ffada8
font_01_sfnt_off00010465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10465 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C77 22724 bytes
SHA-256: 4928046f1e4cff1c46c73c06956c5b187a3d2c289b3f79d1ef53969ba76004b6

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