Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1e97e93a4ee5b9…

MALICIOUS

PDF

39.7 KB Created: 2020-11-09 10:01:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 73af338a4c0ef81f5a5506cd28b413c0 SHA-1: 9dba52cc33e8a3becad3e30470248479865da85a SHA-256: 4c1e97e93a4ee5b9d02d1b4313472e22d1b73f2629df5dd6dc4cd0321951c640
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=marble+sorter+pltw In PDF document text
    • https://nometiru.weebly.com/uploads/1/3/4/3/134379396/040b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f8b054b14ed0.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/janutukoso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a64946fd-8bf7-4561-86a4-f6a30100c62d/vivokafudake.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/ignou_assignment_bshf_101_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/em_spectrum_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7931936f-2bce-40a2-8ecc-71d35b72424d/pokemon_x_male_reader_harem_wattpad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886cc288-4170-470f-ae99-f84aee721598/49252213576.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/point_blank_blue_ash_rentals.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_off0000549c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x549C 5048 bytes
SHA-256: eea8d89ff5b2c9c3a761dc53b05db2cdc244b9fb080364dec6b33a22ae7307c6
font_01_sfnt_off000065ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EC 13044 bytes
SHA-256: d46a88b972de89875bc88ed9ecb94761c1d6a7a0b22a6e71e8e5425ec1cc89b8

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