Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d74f047f4f7da29…

MALICIOUS

PDF

109.9 KB Created: 2021-06-10 08:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 04956df7a37f368cb3a5c86de48a75e3 SHA-1: cc03749c5273b4140a1e432161b49ca03f25490c SHA-256: 3d74f047f4f7da29b13a49538bed535fa9782f0e91e1432bc0148ead5aaa97d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, possibly exploiting PDF vulnerabilities or using embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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
  • 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://pistant.ru/uplcv?utm_term=minecraft+pocket+edition+demo PDF link annotation
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ui7aqc17vfieff9bcti8nm8sq6/96865136666.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a37b16b2e5---74389679059.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/7cebdbe42a263f4a509ed1aa2a53297b/towetawurivunibiduzal.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4ab2784d1---mapemewokozutes.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/f3fc96d3633a86c19c84420989717b81/dofabumit.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa2ab31c84---lunomalujan.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/barimidexupogigabu.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/ef9966f3fb3e36a93481356461ed9d90/14102946315.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/s6lihlqekp7go4117nj3dr1s12/lotexurovexo.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%252Ffile/bulezarazenolutibojakole.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/9475931161.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/betogixaxuliku.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/712522715ba6cdb163768194e277ba4c/bofixag.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/24d77dff3c05bdce7c10a701a0f1d1f5/kexakigolavofa.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccaba333c2---90984927284.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/ol2or71bquiu3ip0un5kjha295/19517845738.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afcf4915668---wawomalerapixuxifet.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/5a8c530b9f47df1830209b28434d3bad/fewevevubuxawerijazizena.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16079b5a12a15e---62915262983.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0001137b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1137B 19736 bytes
SHA-256: b95529143eec46c0ccef03011bc1194934282ca092b8e9931dc90bb31ca25520
font_01_sfnt_off00014b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B8D 5160 bytes
SHA-256: b06568678f87acbca18e442922cc716af7642cb49eb9f4795e45b1a377659a87
font_02_sfnt_off00015d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D1A 15016 bytes
SHA-256: 2392be98b0865e3e6778f3925dbb90ea4dc1016f61f6a1b2cbf2cf97ba840dec
font_03_sfnt_off00018d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D61 18108 bytes
SHA-256: 7f99a9cc4376a12872cbf884c2fb89a514d16c6c8458b6d6bb4f1c7db3a3b373

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