Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f717100692da55a…

MALICIOUS

PDF

40.3 KB Created: 2020-11-04 01:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9396ff16d307477fdbf29d31318a1943 SHA-1: eb8a5c1e871693228a94f43921b7e6fd62d7c79f SHA-256: 4f717100692da55ad69481aefdd553e251c87b4b2a16fd160f28e6bce13ca37e
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/aws?keyword=same+area+and+different+perimeter+worksheets In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_5f9b83023b018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5f9c0b1b08573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404983/normal_5f9310fae64b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5fa11815edd5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0241/2446/files/52278166107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/497c91de-d628-48ea-9950-82679e40c26a/98284978082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13501113-ad94-486e-8044-5a1f2026faca/80656916615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8c0310d-1582-4791-8c46-199e29652e95/xefaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/how_to_make_golden_apple_banner.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/20027935363.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/baptism_and_the_lords_supper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb5a51f1-c30c-4464-a3c7-ee7384ffce78/mofikisomelowi.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/4632059860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0667/9997/files/isomeria_plana_exercicios_com_gabarito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bc98ba0-ecd6-42e2-921a-02eeafc56323/best_dog_shampoo_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/a_delegation_for_this_dns_server_cannot_be_created_second_domain_controller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e738b0-e62e-481d-9848-6ff5b595cb9b/41795928611.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_off000048a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48A6 5508 bytes
SHA-256: e02876571fe2bd6869ad60a5ed20e2d29a3a3f23c6242f2d6ca35b6e6c7e8e36
font_01_sfnt_off00005b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B48 9864 bytes
SHA-256: 45814135b763812692b58cc7e2f8e958021801beab76e2931d0899877e230cf6
font_02_sfnt_off00007ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE5 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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