Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8f833b065194d9…

MALICIOUS

PDF

42.7 KB Created: 2020-10-27 05:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b74f9f301a4990e24890d3aa29de28cd SHA-1: 2282fe9358630d088c10fb12cedf5782ee818b25 SHA-256: fe8f833b065194d9b24f9a47ade7858b4ded4c65e3e63ad44c6df041b959594a
94 Risk Score

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/strik?keyword=universidad+autonoma+de+guadalajara+facultad+de+medicina+veterinaria+y+zootecnia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_5f94c1a70560a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5f8e4f3f94e83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f96a1114ada9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/28086809038.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/34887784547.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/61583153135.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/vaxasalenimivozena.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/34462654204.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/bangla_comic_golpo_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/61033293173.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/wafemabidoterajeve.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/refractive_index_of_a_triangular_glass_prism.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/limetesazidibiwoseto.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/aphis_gossypii_glover.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/rudagezavoriri.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/87598968432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd44ef8c-5702-4a6e-a658-109e459028aa/mefakebowel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c8ae6ef-43b3-4d96-ae5a-cf89411bad25/48947981805.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/71272288855.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/aliphatic_and_aromatic_hydrocarbons.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/bipap_avaps.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/art_and_answerability_bakhtin.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/anteaters_guide_to_writing_and_rhetoric_5th_edition.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_off00006476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6476 5620 bytes
SHA-256: 3dcd8b9379b4617aee9da10d696ae06ecdef76c66d035bbf763047cc86e77338
font_01_sfnt_off00007796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7796 10516 bytes
SHA-256: db4ae68753a8a7e1cb389a32c7b89ac1bf89d40ace583ff0858139db62487fa4