Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1ff4a862729ece…

MALICIOUS

PDF

74.1 KB Created: 2020-11-20 08:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2465522697c7ec8b76187bf93a3e0325 SHA-1: 1a44dba70c9a7a1d39d28fd4e7e628c5258e4d6c SHA-256: 4e1ff4a862729ecea33057cb4c84d2b7fe39e5c9350c035ed037c7b495b02101
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/aws?utm_term=gce+2018+government+questions+and+answers In PDF document text
    • https://pusemekit.weebly.com/uploads/1/3/4/6/134680760/sonokubit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f8e1709bf686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_5f9a865d45038.pdfIn PDF document text
    • https://nabolonoroxene.weebly.com/uploads/1/3/4/3/134373159/4b6a387d3b64426.pdfIn PDF document text
    • https://devuzagobeli.weebly.com/uploads/1/3/4/4/134431767/8b92d.pdfIn PDF document text
    • https://vefozifus.weebly.com/uploads/1/3/4/3/134382693/wodex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/492c3f97-5050-431c-8afb-14957c464d8d/2016_hyundai_elantra_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4d82de2-3089-40a3-bd55-617815271330/zetitokitofeja.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/49562749716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd4634f-8a59-4834-9240-8e1c0589fc2d/harry_potter_lanetli_ocuk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD552 5936 bytes
SHA-256: 5b048af380ea76f9c7e902d95fb447c3c780430df7b6e3fe8cf875247ffc1f3d
font_01_sfnt_off0000e979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE979 10600 bytes
SHA-256: 7f34a874f13af132281906f3739e0b45235223975040d140e50a5b0fa28f2919
font_02_sfnt_off00010d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D59 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378