Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0ffffab62f9d2b…

MALICIOUS

PDF

63.7 KB Created: 2020-11-19 01:59:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 52d9c513d00180bbeb59963a78679b91 SHA-1: 1481b7df33e3f8aafd0971126bba1b4060667036 SHA-256: eb0ffffab62f9d2bb8d207da2eb20abddb8e94545ed39f5c4a142bed4c2671e2
154 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. 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 0.9998

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
  • 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://gettraff.ru/strik?utm_term=nitro+pdf+gratis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f890bac26570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_5f8bbda8bb00f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457320/normal_5fa10d146c42d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d66b49ea-ebe9-4db7-9b68-e18b3fbaae12/delta_flights_search_9.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/vemumorowulelir.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/la_lupita_san_jose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a239d96-7b31-4d44-954a-9d0c5ceb394e/kutujizusokokozigebu.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/tejerusuwodubamev.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/jorakofifov.pdfIn PDF document text
    • https://s3.amazonaws.com/vofosuvuwapiwo/baxilazitabenixab.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/ninja_mega_kitchen_system_1500_review.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/firestarter_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/9182015816.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_off0000bcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB3 5144 bytes
SHA-256: 392166021ea825aff9b75c2c6a3663caa737078b44ef2e0fa3660887a070e930
font_01_sfnt_off0000ce4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4D 10972 bytes
SHA-256: 917aaea637c1e447d9382715a3f2e84bf76a94582dd5297279f85f967172697f

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