Malicious PDF — malware analysis report

Static analysis result for SHA-256 b33c307a28b59aab…

MALICIOUS

PDF

68.7 KB Created: 2020-11-23 21:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b5e645d7d7ed0416ba736edb3c5897d1 SHA-1: 3f8c1f7098678369ba7acc12347ba9b337f4157d SHA-256: b33c307a28b59aab81133aeaae4d13b097113f01faac427ba1fd8988134ffde3
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 0.9998

Heuristics 4

  • 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 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://traffmen.ru/strik?utm_term=the+leader%2527+s+guide+to+storytelling In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381759/normal_5f9569b6c23c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_5f8f87166a1ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475564/normal_5fb3d493742ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380211/normal_5f98c07aa0e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_5f9dd9df219e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_5f9930c561e8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f8753fb34d64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455884/normal_5fade78f97c2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379498/normal_5f8b8f4b9becc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6a4062d4-df5a-4774-91f1-db714bc2a032/luzusisaruxoxumidasus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c000d0ab-d990-4340-bb2a-04b75bb93635/naluvilexuku.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/setekobetadefeporobepevum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69570a5a-a735-450a-8d03-2f9f349bbf33/new_balance_fantom_fit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5590eaf5-6a89-4051-99f0-2ec74ad91d4b/wutolazogofujugimadavex.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A0 5056 bytes
SHA-256: 5cfa3ae9c7135bff3d0e5c251850408339478ec3ac2406e3d3a09730d59f36bc
font_01_sfnt_off0000d3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CD 9992 bytes
SHA-256: 19b43c406e85fae96fdf32741e69e921e99f771e15c0f75d03105c5f497c2bf1
font_02_sfnt_off0000f5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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