Malicious PDF — malware analysis report

Static analysis result for SHA-256 710bf6de65362e9d…

MALICIOUS

PDF

88.8 KB Created: 2021-06-15 17:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6f2f3875e96e2087fadb3dcbd813a197 SHA-1: b0e4e734fe2daf503f8812e2d45332fbe85f4b9f SHA-256: 710bf6de65362e9d7ad09845c87b638581abf616b49459bb872ae51e55ae52cd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF sample was flagged by multiple heuristics and ClamAV as malicious, indicating a phishing or trojan delivery attempt. It contains numerous links to compromised websites and a visual download button, suggesting it's designed to trick users into downloading further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an exploitation attempt, likely leading to a second-stage payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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 https://ketchas.ru/uplcv?utm_term=ngk+full+movie+tamil+online PDF link annotation
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/1160973321.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608394832c107---29114873565.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802a93db1e4---74525673206.pdfIn PDF document text
    • https://noddy.nu/images/file/27154580171.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e55d356a4---52403688464.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/meviposijogatisomaveduxit.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098410741feb---simesakatoxir.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/zanewexelobupepixomobuwa.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/50697286047.pdfIn PDF document text
    • http://busanpc1.com/upload/fckeditor/file/wadapobuvejesanuzawisa.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/ocejlc8hbt2ntmn87c0vu43c7d/71731174018.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/323fe12b437d185a13073876c8c93cdb/logunetijaroredebisije.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084adfeeab01---zadulezexuwuwobero.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/46815796391.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/0719e812942b5d6b3ca169ede09999c5/95099545812.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/96877789197.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a377155f3d4---79983972649.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 4904 bytes
SHA-256: 35a31add76f793f2e57cc8f59915f79bf7b6a1b187f2785c697305caf192fcf9
font_01_sfnt_off000100a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A2 3404 bytes
SHA-256: b830d0ffbeacab583067e9de71e6c28ba6cbdac27d11150851e75eb06fa75794
font_02_sfnt_off00010dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEE 2504 bytes
SHA-256: 0ee854a24b89f7ee8570bbc505c50a6667f3068117e125e0485dee6a0a160261
font_03_sfnt_off000118d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D5 11492 bytes
SHA-256: 7f89f781b35a7fa24f89d861340faf8fcf48523270ac77b06c20ce805efcf3a3
font_04_sfnt_off00013fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE5 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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