Malicious PDF — malware analysis report

Static analysis result for SHA-256 77344c24579c777d…

MALICIOUS

PDF

68.2 KB Created: 2020-12-05 02:38:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7d98f2fc54a216010ba9dc9b911e23d3 SHA-1: 9091cda769239cce044b09d4c52012e5b609d91d SHA-256: 77344c24579c777d4606ba46587f34fa12ea0c0d0fc19f7bb826f7a2dab90fc8
194 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. It uses a password-protected-archive lure. 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 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://gettraff.ru/123?utm_term=random+symbols+in+word+document In PDF document text
    • https://xizogezoki.weebly.com/uploads/1/3/4/7/134717510/1118954.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/6291139.pdfIn PDF document text
    • https://taneromujek.weebly.com/uploads/1/3/4/6/134611199/wopoxisixo.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://s3.amazonaws.com/nijosinizo/33574807215.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/muluj.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/57596993969.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/22881283752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/561e6021-a9fd-4f68-a000-301feae2ba75/nabogojumitala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee53b002-14cd-4d5a-becb-5a68639d5477/16952543423.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_off0000bd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9C 5308 bytes
SHA-256: 003a2395ec9c945833b1b790c0a8b1cc5462b8bf598be314d02918866180c08c
font_01_sfnt_off0000cfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA5 11412 bytes
SHA-256: 260d062ba7e7f175b7132b846cbc5fd82a025efb77e5fd46f38a5d82c4e20ef2
font_02_sfnt_off0000f694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF694 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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