Malicious PDF — malware analysis report

Static analysis result for SHA-256 55411245ace74ca9…

MALICIOUS

PDF

64.2 KB Created: 2020-11-23 18:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3e1d682e6a70f395f7b7a88ddf318144 SHA-1: 9d0e8e0c07878c6e6c08df8b436d9c627196d191 SHA-256: 55411245ace74ca9d9747ab7bdc8892f8e1ab69ebeffa4c1ca5feeaafc0e4c4b
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://trafftec.ru/123?utm_term=little+fighter+2.5+download PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/liluvad/fuguvajojep.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/97643955431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a34b1963-e378-4f8e-86b5-7daed63b95d1/ja_henckels_everedge_knives_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c13a63-74d2-4b94-b01b-937f1689c029/tukaxexixoja.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/13836545257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d4f5d27-7134-4e8b-acc4-581eef397da0/85023710919.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/thomas_jefferson_football_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471f1d85-057a-4b00-8bc0-37ea6684068a/contrat_depot_vente_vetement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42d89847-29a0-4f7d-9f2a-e0feb38624a0/the_irishman_parental_guidance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668ddcd1-5d6e-4c28-90a7-f76e44f08dda/9622524874.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_off0000c013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC013 5312 bytes
SHA-256: 867a8a4ef67ad9bdc6ad4ce891603c2ef7d3171f6aebe7a897bf3ccad39a498d
font_01_sfnt_off0000d23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23C 10136 bytes
SHA-256: c570a3efa3975b039071f802667c43f24a66d9641f429a7dca8c6381ef504449

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