Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd4863c7802e669…

MALICIOUS

PDF

89.7 KB Created: 2021-07-19 22:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 00d88f11dcd42cf36084f2c0864934d8 SHA-1: c9e138d6667f23db18d3f8c415b17167c467269c SHA-256: 8dd4863c7802e6690d4bc6859e13d31342168928570e36b78d2230474e4a1849
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The document body is heavily obfuscated and likely contains exploit code or redirects to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/1e6a70c74d10a5bc2d5996d9e0c69bbc/vefazajasowegomifupal.pdf In PDF document text
    • https://esperanzadeavila.com/fotos/file/xanigorefesavibup.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160821172eb546---losedomorafet.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ab39a6984---30476496132.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/rimane.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9db007c1d---xefexolulebuwe.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad074cabed---liwopurapapemilutonafemu.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/roxetilo.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/kebozosezemotovanalutala.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/monevorelus.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/97685857656.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/19h4ef126sovjknrkfkbb9msbb/30999123372.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085988f5d0c3---fazopamozasadogege.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/enue0e2i6bilrar32fgi6hcbi3/rapikilefoparijefixi.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/jijagigusujovadipunupukar.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/83137568888.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/90cdff1396312d32a44ccaf2e6e8c668/salunilobalekazom.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d66298771---demitinebagapabi.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d3555bc5a---38755233314.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d6de0a356---gisozenugitoxigasofelamu.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606eaf43c7697---75304060664.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/266897e94f10471c8f5f2af06fc65303/32409166699.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085cf5befc54---rikivinodiwewavogobuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=need+for+speed+most+wanted+game+free+downloadPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b093a6bb72---11310566610.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA63 17344 bytes
SHA-256: 4d4f1556a66e037a73d047bb4d64116c6cb65d6d659403787ffb16c85da16d68
font_01_sfnt_off000127ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FF 10812 bytes
SHA-256: 59ebcbef868dad8a5455925c92776f0c04b7ff4b9fa8350d44d717382ad6f4a6
font_02_sfnt_off000140d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1