Malicious PDF — malware analysis report

Static analysis result for SHA-256 87fd9b0ad0bdae27…

MALICIOUS

PDF

59.0 KB Created: 2020-11-01 18:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 088943daec9c1f16fa84b2f3a779f1d0 SHA-1: b98ae639da6853257c9e08e16ed860811b28b423 SHA-256: 87fd9b0ad0bdae27301f6742c2bbbf95f718199f3c2565d6fd57f9e28ab5a918
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link to a known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also flagged this PDF with high confidence. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware distribution site.

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/123?keyword=south+bend+lathe+oil+pump In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/de393d85-18d9-4799-97fb-586356070e81/sepiziwiwopub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6a0a203-bfb0-4878-bd4e-be8741c4e5d9/wwe_2k18_caw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3501ad5f-a144-40f9-8d40-398a364992a4/fizaxegofujelisujividoref.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7bd5c31-a595-493a-8c68-789054899c85/condiloma_acuminado_bucal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4c6878d-fbd6-49be-a05a-3be26adb9f9c/jilaselopuwopexamuwomado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c7522b-2233-4ffd-8afb-5809833b0113/color_c_lector_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a06f60-a1a1-4bba-8ecd-6269e95c7961/60782360623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4e19b9-61f2-4cad-b292-51a83aa3dce7/antonio_piC3B1ero_libros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff5c72bb-f7eb-480e-a498-b18a6da77dac/xalawipepod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46798923-c14c-4a41-929c-9a377db7ada4/30676825718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee5444be-114b-461e-8f84-0eee4f3a758f/sudoku_facil_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/blender_review_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f119c8d6-0314-49e4-aeb0-646ce9decedb/gobinifamobokiferebe.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/multiple_allele_traits_in_chickens_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0716d390-2162-46c8-9708-c7684a205b74/8069635625.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/bogata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c2876ab-df53-4f05-b2eb-d0eddadd8914/nidobogimekuritij.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_off00009bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCF 5052 bytes
SHA-256: 776ccd1bf1f7be39957da9bb58f681ffec7036588e70e90a774cebcb7a907bbf
font_01_sfnt_off0000acc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACC3 10800 bytes
SHA-256: 759e7e52f350cd9a15e4133d88ba0484eecad0e293c090cf0a4cbab1400cfb49
font_02_sfnt_off0000d141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD141 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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