Malicious PDF — malware analysis report

Static analysis result for SHA-256 23fd52381335fd70…

MALICIOUS

PDF

111.2 KB Created: 2020-12-29 18:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4546a2168db4cd6728dbaa9ac74f297a SHA-1: 6c0d9f6328b0aa406e225458bd224e95e2576859 SHA-256: 23fd52381335fd70c40815e701d5228a7eaa350c8761139aac0d7c7bd0fb528c
96 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 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 0.9998

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
  • 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://trafffe.ru/123?utm_term=genre+and+subgenre+worksheet+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451544/normal_5fa0d3eb3cdf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420431/normal_5fd2270927a82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459319/normal_5fa5b76744c64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f8e78937f725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485162/normal_5fbdf8219bd04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388835/normal_5fc7c42617583.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/fotojipifuzitul/orlando_magic_tickets_seating_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/wuvavomukiliwufupali.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/17249562394.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/firixavalopil.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/oakland_raiders_draft_picks_for_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/2112193959.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/wegagaj.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/harry_potter_hogwarts_mystery_friendship_level_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/36138891816.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_off00017793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17793 5516 bytes
SHA-256: a37e3448ac2e9bfdf321549c5b5d91eb3f159f7821de71979414ecc68f27b732
font_01_sfnt_off00018a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A63 10988 bytes
SHA-256: bec873a7dbb1fecd47431a448aaf999a85c4a4610e6bdb1058d0017dd7176162