Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a11928baf6edc6…

MALICIOUS

PDF

79.5 KB Created: 2021-03-01 15:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5aefc6c3e5538af69e959c6f80d95503 SHA-1: 55071408110140c93c2cfa6fe7a28b17426aec33 SHA-256: f4a11928baf6edc6c8de7b7ca3c436cea9843fa7689799a8c738215139a4a9c1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into navigating to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://midufefew.ru/wix?keyword=chemistry+science+notebook+teacher+edition+answers PDF link annotation
    • http://nijaxubazaziw.mypressonline.com/fijogukuzutujur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418786/normal_603b3ff1e07fb.pdfIn PDF document text
    • https://cdn.sqhk.co/latosagax/Jheiiid/vice_president_debate_2020_highlights.pdfIn PDF document text
    • https://cdn.sqhk.co/bemememu/OicsiaM/cookie_clicker_cheat_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403417/normal_602a6d652dcc9.pdfIn PDF document text
    • https://cdn.sqhk.co/kapimetavis/ijXbsJf/3785446225.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387036/normal_5ffb69191cf7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421048/normal_5fc70e36018b6.pdfIn PDF document text
    • http://reassurez-moi-fr.info/11920852698g5ntm.pdfIn PDF document text
    • http://dalkomis.website/mexuvojulixonuxorofh9cdc.pdfIn PDF document text
    • https://cdn.sqhk.co/pagozixupezi/iqxVogg/skills_leadership_theory_definition_and_characteristics.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/cB7HjgB/dead_city_book_1_summary.pdfIn PDF document text
    • http://qwert-ita.fun/99933739948d04s3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E4 5452 bytes
SHA-256: b14d5e01d2c716b3399313e55b5c7066e9a3a3ed968b974fac96f19b0cacc35d
font_01_sfnt_off00010b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4D 10920 bytes
SHA-256: 27e6a81b881f8d27c5018b9fadd55ec6c710a51508bf06317113fa27c9ea43ed