Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6e29f3be937910…

MALICIOUS

PDF

40.8 KB Created: 2020-11-02 07:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 51ca2a37acda521bba1ed33378a46d0c SHA-1: d1d0737b4382a93d0e5ba9931b588eba8ebda346 SHA-256: 8b6e29f3be93791000fce52c1393e9138da217a55325d28f7cc71011ee2991d1
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://ttraff.club/123?keyword=different+types+of+biologists In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_5f96f8d166620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_5f8f3f5733c84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/kizi_4_games_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/88433121980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2abdc80-bab9-4053-a606-2cbb3b4f938e/ds_drastic_apk_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/contract_for_deed_peoria_il.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b9959bd-a7b4-4234-a69c-42bb54aae4cc/44213318714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368de489-67f1-4824-926b-a8d6a934771f/storyboard_templates_for_video_production.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/senawumanemuvobuz.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/small_intestine_anatomy.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_off00006253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6253 5100 bytes
SHA-256: 419a50657e90539b60d321d99a9fb7278988e2afc866a09913bd391fa345f5fe
font_01_sfnt_off000073d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D3 10160 bytes
SHA-256: 88e71d0c29f31121bc929603369b71564876258038ce68fcd63203fd19b3af2c

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