Malicious PDF — malware analysis report

Static analysis result for SHA-256 453c3c1563887323…

MALICIOUS

PDF

60.7 KB Created: 2020-11-24 08:51:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6d70ca4adbca3c0e58ce0509567dc9fd SHA-1: 98f93cf901bce3fc7f80a012aad4080dc702cc63 SHA-256: 453c3c1563887323d6147ddfed3cc961f4f00d626a94b00d24f798801475d961
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://traffset.ru/strik?utm_term=cube+root+table PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5f9ae14d7f224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379855/normal_5fb8aa5acf861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420431/normal_5fbb8ae8a671b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5f8d511297c0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380701/normal_5f8bf81adbbe8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1cdf00-7155-48c1-b0be-42e1d8107b7d/nha_free_phlebotomy_study_guide_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d4837d9-5ffd-4c22-82d9-efbfe3155b9e/47634863715.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/40331685365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c01ab4fb-1f01-4a97-9eac-398e6accd6bc/51245089043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/388eb77f-d2d1-48bd-9ef9-2583840cc9dd/bewivokonafofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58368eb2-7a88-4033-ba28-ef1c3f36afea/gavufugumusapofadov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1db21f5-b461-4fdd-a581-cefb21578f13/depevexetijevuxalotase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4121801c-262e-424b-abaa-8f60686c55dd/74340538828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc2f26d0-2f3c-4746-8e4e-1fff971f6cd1/15150485055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a108ecd5-ad59-4cd3-9c4d-f359c7932660/zobozuwadamexedufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffd1d8c5-8664-46e8-8b51-a2dc64e252a4/50541237705.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB620 4544 bytes
SHA-256: 3b45682dabf15d3938b96caca8a465bab657e6ae90b4910c21ed51191df94694
font_01_sfnt_off0000c597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC597 9540 bytes
SHA-256: 21ccc47748aa40031cc073df495356d67f8c2e7ec71c0e83fb852330596797b7

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