Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8b329564ec536f…

MALICIOUS

PDF

50.4 KB Created: 2020-11-02 23:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: cd5658b58f95f7af3003be130cdf7dde SHA-1: 218b096278977b1d9d75040a27fe85dfb55b5728 SHA-256: fc8b329564ec536f08e508c25a7a9cda5f8f9539b69fa317e9b765994467bb78
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://cctraff.ru/123?keyword=pokemon+sun+and+moon+breeding+guide In PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/8444efb68af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_5fa052fd540dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423145/normal_5f9b45bc82b7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8820b457215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f891813dde15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389361/normal_5f9087023901b.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/72679c45-a034-4404-829b-8c7367b1152d/44785467474.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/wanamumelor.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/impact_of_climate_change_on_agriculture_in_ethiopia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8350f215-f3eb-4fd2-8439-ec0da1411cf3/manchester_england_england_from_hair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4952dd08-8ee2-4609-a816-e1be70cec4c4/7410049049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/674e70fb-597e-4455-8dc8-3894198931db/43662129568.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/10133764768.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C0 5320 bytes
SHA-256: d2733662a20b10706bb9ac66134c8de4fd41f0e43a1679656da757e75bca0128
font_01_sfnt_off000082bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BF 10804 bytes
SHA-256: e349603668f30b16c6f24dcd14b660cfb8fbdf99c86663520c0c525098b1c376
font_02_sfnt_off0000a79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA79F 16144 bytes
SHA-256: ae7f93972994935718ba4ca09ad89dad7d5debdcce6018e7b29f2394b45d7aae

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