Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f8f513e6edfd87…

MALICIOUS

PDF

39.7 KB Created: 2020-11-06 01:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 10a270459e7a781776a9859857363708 SHA-1: 172a5339ee92dec4e4c021aa84909bc5823cfece SHA-256: d3f8f513e6edfd87bef2548d264534968b998da442aa56c14a50e5bca7c933d0
94 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 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 1.0000

Heuristics 3

  • 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://traffmen.ru/123?keyword=game+temple+run+1+online In PDF document text
    • https://diziwupufetut.weebly.com/uploads/1/3/4/4/134477772/1083980.pdfIn PDF document text
    • https://lesemaxaje.weebly.com/uploads/1/3/4/6/134617162/wofilirek.pdfIn PDF document text
    • https://reruwezoketa.weebly.com/uploads/1/3/4/5/134503250/lizifezabez-fizenilevoger.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_5f98e5e919585.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/sixibijezedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379854/normal_5f956c5b55ac3.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/54fa791e-2ff6-4987-89ed-e5b9fac9caf3/shusaku_endo_silence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2667/6388/files/rupirubarifamol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52878b26-1217-4c2a-a275-34e872a69c84/fire_protection_minecraft_id.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_off00005d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D74 4872 bytes
SHA-256: f1d7d352dd3e05115ccd422268dedbba5def608a24eae2bf36e82ac68e181b8e
font_01_sfnt_off00006df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF4 10676 bytes
SHA-256: 9b9ac89a1eea7773b30a1ac26a38affb0cce854469f4fe5d62e2e997fdc23349

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