Malicious PDF — malware analysis report

Static analysis result for SHA-256 97627987f3df8142…

MALICIOUS

PDF

41.6 KB Created: 2020-11-05 06:36:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6f59c6e38a1e385b9b83a16354d5a224 SHA-1: 2e3b22c61efe257d3ac79ec0cdcee80e112302e3 SHA-256: 97627987f3df8142f083e4e5085b63152b8c2681b27b569d6d38665c5edfbf2f
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/strik?keyword=gmail.com+mail+sign+out In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5f88940fb9614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f8b64997d4d5.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/davejibot_befil_fanevupolur_vijawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f9d93b2f3ecd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5fa2cb51c459d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f8e1ff22784b.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/d3153c6c-69e5-422e-9ed6-d59b1dcbb3d6/algebra_2_chapter_11_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/xameraxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48febda6-a9bc-41a1-bc2c-953c06c3b16b/how_to_get_to_cinnabar_island_in_blue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81079ca2-12ed-4428-b413-ff35ab978679/82396385719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f355376a-ade6-4e42-994d-54542fa1bb67/zuzanazudozimeluwel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a867d9c9-babe-4b0d-b977-9c02c32f0c09/xomimajixenorimufalere.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/5141827668.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5974 5084 bytes
SHA-256: 9a5edc3f09b2649906f9586701bae0900d496a6900c730f42f52e718ba3c4b8d
font_01_sfnt_off00006aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAD 2004 bytes
SHA-256: befe86f2e9182c7f8135518b94c1ca1a9c8a9a9a6f5fec12d9bc7402366ce87a
font_02_sfnt_off00007444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7444 10944 bytes
SHA-256: 0d950d409aeadeaaea2107edce8f13d1eab5a9366c287d3c0d88ed8639e90f13

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