Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e8cd76be533c67…

MALICIOUS

PDF

84.9 KB Created: 2021-07-14 07:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b0088c5a9e1f64206d1df146b68d78fb SHA-1: 07472ef3b5154ff810e476fde33e4c7794054912 SHA-256: 96e8cd76be533c6764ad8d6e14d9bf9a96b8227b9388b5a4af0e03edb57852ac
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that exhibits characteristics of a phishing lure, specifically by providing password instructions for an archive. This is often used to conceal malicious payloads from gateway scanning. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous links to potentially compromised CMS upload directories suggests a distribution mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bec4a544e37---39247827307.pdf In PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/64285af68548ed6e56d4021776c64615/59889356679.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/burutegarowulivosokobe.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/13008181901.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a825e915866---rikuz.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/rukabine.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/mitaku.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/m26gjahk8srsqv22n7hp51q222/48792844362.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af92c611e56---44738459690.pdfIn PDF document text
    • https://atl-50.com/files/file/gazeniwodubujilupozo.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099562c4a994---9147984273.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c08613f934---91770857819.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/bunusamiwa.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/0d4fa4269f26a739e75c36369aa32bcf/fudokudibuzi.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e67b7d6ebd286867e15d4cf30e537950/56032719417.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865af7e8a52---kevopud.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/febarutedidoregutokofikak.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/winazataruroga.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/86457182223.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/27867205497.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/vofosaf.pdfIn PDF document text
    • http://samtekelektrik.com/files/63730001397.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/kikage.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad95fa9a6dc---62865158820.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160820f29630de---zawuwaj.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4389479d6e---93968740073.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=miracle+box+crack+2.82+driver+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE726 17212 bytes
SHA-256: 8b1311ea7bc775953bfb31bf2a28e6c5ce21eb36097fecd1ac7945ab141a22d0
font_01_sfnt_off00011426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11426 10972 bytes
SHA-256: 7e459a0044d52cede2ded8d04af8b460824d94238136e4c5f3f4496209fa6644
font_02_sfnt_off00012dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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