Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbc3f2c89622b68…

MALICIOUS

PDF

157.1 KB Created: 2020-11-02 23:33:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4ae38cbfcf8c6be4947cd7c951a74f78 SHA-1: 87e95bb415594af95a143dd47837c4b0b8bd241d SHA-256: 2bbc3f2c89622b68ab8b82191673dd1a1606a079729ee0f2593235fcf9ee538c
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link pointing to a download lure. The document body, though partially garbled, contains text related to downloading "Axis football 2017 free download" and a URL that matches the malicious redirector. This indicates a social engineering attempt to trick the user into installing potentially malicious software disguised as a browser update or extension.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=axis+football+2017+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_5f89b098173bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382418/normal_5f8db363bafa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374373/normal_5f8a18e4cc199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_5f8d0410720d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_5f91f051e5891.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/zewimu/hedgehog_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/99648885746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cbe828b-2d95-4422-86c3-10a07d2aae47/weboziju.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/pool_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633ad5ee-2dbe-4b29-9665-9d663844aaba/nstm_chapter_505_piping_systems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c9a37f9-9c5a-49cc-8709-6bd29db9c01a/wanapezuw.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/comment_assembler_2_ensemble.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/bupimagi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off000238ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x238AB 26416 bytes
SHA-256: ed5b5da2d5ac0d147e8a706172541e4cb7698379b8b438706ba374e1f44cae49
font_00_sfnt_off0001fe04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE04 5596 bytes
SHA-256: 052c567689a4c57e3831309c0e55e76e76aa90c9d3473cd25550b4492f2689fe
font_01_sfnt_off0002113e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2113E 11668 bytes
SHA-256: e90a70476b67807798ce13021d5da24b929d6f7aa03ea104b8117152ab7d42ce

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