Malicious PDF — malware analysis report

Static analysis result for SHA-256 636adbefe944b33c…

MALICIOUS

PDF

46.2 KB Created: 2020-10-31 02:37:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 56c432a921862858098b9056f50738a1 SHA-1: db133e8ecc9e477f404919f7a7245a16f49c8018 SHA-256: 636adbefe944b33cd445d09e8d86563b678817138b6d1f64cbc6f1a8430cf081
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://gettraff.ru/aws?keyword=christmas+riddles+and+brain+teasers+with+answers In PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/520570.pdfIn PDF document text
    • https://gifezimudafero.weebly.com/uploads/1/3/4/3/134312010/e502f.pdfIn PDF document text
    • https://dujenavu.weebly.com/uploads/1/3/4/3/134366251/6ef27b875a.pdfIn 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/c7604366-718c-4d8b-bed7-d5ed8f523b2b/doruwipijurat.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/giwobonoparokipezusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19a5a22c-8a60-4912-9445-ef6dea36be69/nolururibodamodefud.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/wekekomanifilefuvirak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e73d2677-f49c-430b-98ca-755584c4878d/hotel_design_planning_and_development_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd249b2-60fa-4fb3-81d8-09260294e54d/importancia_de_la_contabilidad_en_la_administracion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe87b0b-397c-4eb1-b739-97c4fc9bd11e/army_battle_drills_powerpoint.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_off000068d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D0 5000 bytes
SHA-256: 774421823f752bd68b38b45f1df17421994cb57b9a79a37d0582faf470827513
font_01_sfnt_off000079aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AA 10664 bytes
SHA-256: 5d8f372f1788aba9b083aa639e463e86251542ab8b607b8e6e876d06cba89fcf
font_02_sfnt_off00009de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE5 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f