Malicious PDF — malware analysis report

Static analysis result for SHA-256 5536665217d04c53…

MALICIOUS

PDF

62.0 KB Created: 2020-11-21 02:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9a8db03817b093176d6d7a55e8c05ac1 SHA-1: 19d7a4dc6fe99d23fb2ceebd4016924caee89b6c SHA-256: 5536665217d04c5382ff0dbfa5e7e03bf69cc0152f50c46b5767c7b1affe78d7
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for phishing or distributing further malware. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent. The embedded links, such as 'https://traffset.ru/123?utm_term=cub+scout+webelos+book+pdf', suggest a lure to a phishing or malware site, likely disguised as a relevant document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/123?utm_term=cub+scout+webelos+book+pdf PDF link annotation
    • https://gumelajijepepa.weebly.com/uploads/1/3/4/6/134639918/tisimorowa.pdfIn PDF document text
    • https://zupipozove.weebly.com/uploads/1/3/4/5/134589893/zodinorunuvabodasima.pdfIn PDF document text
    • https://sobepaded.weebly.com/uploads/1/3/4/3/134305425/4649706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411252/normal_5fa87a99cc0bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5fb7b16012237.pdfIn PDF document text
    • https://tedemikof.weebly.com/uploads/1/3/4/5/134593475/zilirolosokono-givepuraba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f876034300b6.pdfIn PDF document text
    • https://nusekaturorofu.weebly.com/uploads/1/3/4/0/134095869/cb8b1.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/9d8bf0ff-cef8-42fa-96e4-5ee7c13e72d7/mastering_qlikview_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0438cf-f401-42ea-a708-0023c7bade61/64168947023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de8deb58-4b9a-4ce4-9e29-63404fa8350f/6335830797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40db3e86-fe1b-4bd5-9c78-a55e732f12d5/zipejef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b43d7f32-43f3-42a9-a9e7-33965d4221da/fosolowexulekoxarix.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_off0000b5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C9 5044 bytes
SHA-256: 3d9be367a6ef98f85eaa453777e6cfcae273e136010f260001ac7c1ad095ee65
font_01_sfnt_off0000c717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC717 10704 bytes
SHA-256: 2b7179a979821ce3588bf1ce7ec4671de9407352f23b4e1c2a191730debdb74b

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