Malicious PDF — malware analysis report

Static analysis result for SHA-256 441954956a77d514…

MALICIOUS

PDF

39.9 KB Created: 2020-11-04 08:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3307da9079f617344bea66aa62b21837 SHA-1: 944f5485301812e02ec433f5335db24fd629364c SHA-256: 441954956a77d514d9afe8f5f72190840d9b1926bd0e1dcbfea4aed0577dc938
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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 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.
  • 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.
  • 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/aws?keyword=reikart+house+f+b In PDF document text
    • https://nezumise.weebly.com/uploads/1/3/4/2/134265586/wuregixikiz-zividadobo-jezanov-zemetigup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_5f9e2ada85991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418746/normal_5fa1f424e4884.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/zeworibuzoza/direct_payday_loans_no_third_party_lenders.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/academy_sports__outdoors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8ba2de-9a13-4212-9140-cd88743f1026/22664145355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cad9f0e2-4d8e-4ecb-af24-66b14c5c782b/the_amazing_spiderman_games_play_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e68363fd-bca9-48b5-9400-7e044904f15b/sefumowejekizaxexit.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/52639892907.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/world_history_book_in_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bedefowim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f53f326-023f-44f9-9e55-1a3b7e815496/36273959400.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/mazepamibasebexi.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_off00005da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA1 5032 bytes
SHA-256: 5b1c81fa1467e7c944405f2cd636b5e7bab0cdeb70526ae0dcbbb3c4497612d8
font_01_sfnt_off00006ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC0 10988 bytes
SHA-256: cceb956a2a5d6d8e5da74560419d13879d28269cdaee82b27f896489bfdf9abb

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