Malicious PDF — malware analysis report

Static analysis result for SHA-256 4402ee8f496c4478…

MALICIOUS

PDF

69.9 KB Created: 2020-11-27 05:05:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 417a86344505b2af47fe1be10b7846a6 SHA-1: 1c4d05e7505330274ea8cb1570902cf049e561eb SHA-256: 4402ee8f496c4478e1f912be889a53c0959fc567c2f0cd5f9a03e3d72cab044e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of phishing or malware distribution. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious intent. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://cctraff.ru/123?utm_term=emerson+50+inch+tv+reviews In PDF document text
    • https://gavakemew.weebly.com/uploads/1/3/4/5/134591392/jesugupug-funego-kagosojusa-jaxenibok.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/3f5f725a89f47d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458389/normal_5faae1ce1bdf6.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/wuwitadexulotafosuni.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/lelukudere-luneliwusupoj-tesapug-ledetomuvovap.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/bezegoluzose/maths_questions_for_competitive_exams_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/temuxow/tiserilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d698215d-ae70-47cf-aeb2-6fcab73c37fa/janet_evanovich_free_ebooks.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/qbasic_ki_full_form.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_off0000d3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BF 5172 bytes
SHA-256: c259e232642ab66f89114d53f32871201a3677b48b0c04f99cd9c12d68581beb
font_01_sfnt_off0000e54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54C 11076 bytes
SHA-256: de0e9ad8530dea4354cc3c70c482fda6926c220264a590e08eb12b0ceb7dc5ef

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