Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b2cbd08af1ebc9…

MALICIOUS

PDF

45.3 KB Created: 2020-11-01 21:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c49dd99b80695deecc1fa04a2c169de3 SHA-1: 2d2baeeebf1717eef5fca06d9cd345e9eddc6426 SHA-256: c4b2cbd08af1ebc9a6df1a458d5cf1e1e833340a682a61aa7436aed9ebe4c75a
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://ggtraff.ru/strik?keyword=jim+edmonds+net+worth+2018 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f8b4238cbd1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450889/normal_5f9ed0600449a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f9c18b2e109e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_5f97d80106ebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417305/normal_5f971d740e0c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f90e73ee3d94.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/9234d267-6008-4cf6-9f04-c788d4e83ae1/red_giant_complete_suite_download_fr.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/introduccion_al_dibujo_arquitectonico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b559d37f-ef56-47f0-95ae-651edee641dd/68768526243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e946073-b966-4644-bc69-811c80137f30/hulk_full_izle_trke_dublaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/981527be-556b-41da-9f46-b7eb57f1b8ec/ina_may_gaskin_guide_to_childbirth_p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05dd07fe-02f1-430b-94a6-81857f070297/jovixofo.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_off000071c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C9 5424 bytes
SHA-256: 15761ef3e77640e7290c3893011c66e155340dbc05d8b5e66d5a4d74441bf61d
font_01_sfnt_off00008428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8428 10884 bytes
SHA-256: d911236f483a78a6d57107320dcf6025d9a2276632a4caf0d23fb8c34d2a00b5

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