Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf724516e2e6c6c8…

MALICIOUS

PDF

76.4 KB Created: 2020-11-23 15:22:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 056333d104520f75cbc6f967f076064c SHA-1: d0bb18fd5af18d852fc7d8659916a90ffdd57a7c SHA-256: cf724516e2e6c6c807bebb05e3ea26f5f64265831682711527ab6648df39f591
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?utm_term=telecharger+venom+vf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407793/normal_5f92d23a0455a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419828/normal_5f9c24485ec58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5f8848b322434.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/nimikixiwaxananesotonit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef2c266-c3c9-4aa7-8dd2-46a8b9eade90/11237085047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9645f25-9891-4253-9f6d-fd73bc4f5dad/badtameez_dil_star_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/zosejofebebijogepemadewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b51de74-bc2f-42c5-800e-81c2dfe097c8/votinom.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/53455008623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1675fab4-b097-40a4-b4c2-c5c18bd96282/tivelegitakam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c80b73e-1209-4709-889d-d0aece4c34b8/36032073220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d889e6-40a3-4281-8b98-23b2679f779b/nilugawudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb2df63-ff2b-4a99-822b-097e3ee99e19/kojuvijul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1077eb79-8607-4604-8cae-af9b23d23a8e/3620110698.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://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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE08 5124 bytes
SHA-256: de7765fa5d47b73e40e023eb21591bf8ad7cc24d5f70740585f9a13b6cfe9c55
font_01_sfnt_off0000df59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF59 16468 bytes
SHA-256: 2c3b173b287f6e6b36086f3d95370d6824dd21fd24b4e7c66f7f2b86bc40d674
font_02_sfnt_off00010fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC5 16088 bytes
SHA-256: de4163f0fd1d786dd9f436dfe932c333ad362cf0c60848d122a597d9c22621ff

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