Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1eb7a501d71c74…

MALICIOUS

PDF

40.1 KB Created: 2020-10-03 01:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 846c411ebae0289a09a866ba629f6bb1 SHA-1: d1155d1c67a1dbd9257849c4c30456b89aeb48e4 SHA-256: 5e1eb7a501d71c74baf523e6810ecee3006abaf07f35c175d33439aca335329e
102 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were extracted, the presence of a malicious URL and the document's structure suggest it's designed to trick the user into clicking the link, likely leading to a second-stage download or a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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?keyword=android+oyun+club+hileli+clash+of+cl In PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/37333972658.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/kufubibaxijijelujarutet.pdfIn PDF document text
    • https://site-1037840.mozfiles.com/files/1037840/remegawak.pdfIn PDF document text
    • http://bujasub.pacifictrackandfield.com/uploads/1/3/0/9/130969862/6377474.pdfIn PDF document text
    • http://files.mskeleta.com/uploads/1/3/0/8/130874610/ruwafu.pdfIn PDF document text
    • http://nituba.jurassicriders.com/uploads/1/3/0/7/130776644/juxiz.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/f51b10d5-10a6-4faa-9821-49586e91b087/wimekejemujejigubupeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d6d041d-ac91-4393-97b2-8ff9c19cd302/zurazopojijedupekopol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f535833-9ce6-494d-a4f6-18481eb7e820/kifisimujoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edc27b18-2c8e-45f4-aca9-c0e9a5433ad1/vogamova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88db3f38-6a39-43e8-bbaa-8311ab947fbe/pokefabowiwoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b72c9207-50d6-45f8-a1e5-ba87bd0c49ed/2705758799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909fda7f-d354-47d4-9309-fe4759c09f54/63203327737.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_off00005fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA2 5340 bytes
SHA-256: 158c9c7312bf031476c61269100a772a62ef3d06bf2e44135f1ea3d124cf9a24
font_01_sfnt_off000071d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D1 9936 bytes
SHA-256: d9781bf31d25a5f6af205bdf8f2a30c85bbdb45787128b07e0a9ad7e115ebf72

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