Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d07b697f8318afc…

MALICIOUS

PDF

208.0 KB Created: 2021-06-11 13:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7dde0cad4b60b677788a11ec7d7e0246 SHA-1: cfbfaf7abbc16b0ba7918e25cc961b120dceaa39 SHA-256: 0d07b697f8318afc83de6bd0bc561b9847fb8966a41a39d42bbaee01955aa156
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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.
  • 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://chcial.ru/uplcv?utm_term=old+spb+tamil+songs+mp3 PDF link annotation
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/15807736bd040e1ec34c7c7f3d7b399d/fepezorekapobawe.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/91618804798.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/kokisaburu.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/lawolodi.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/bc27d19d82ad7588805796d0920e7ea3/nafakavekejijo.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160acfad3bb172---12320253083.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ba4b8dd20---59790487524.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086160465bb4---wowenufizimegu.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/0vrm965174p65ks003aou0euf2/77719553265.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e839a44a9d---ninuna.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/160799616bd6a5---1517952363.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210608020946.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002fd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD10 5512 bytes
SHA-256: 4c669a0252905d81ba026b9af74f5b7a8fc436ba8b5139fd51b75c8f2f0edc44
font_01_sfnt_off00030fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FB1 10768 bytes
SHA-256: e6c0e729a78f2791aef14cae8b578f3ded3777c5f5a9a326d8ab4481afe2ff87

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