Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca6a1134cf822ff…

MALICIOUS

PDF

34.9 KB Created: 2020-11-05 14:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 47384c0e4c1c050114a79b8a2a01fdc4 SHA-1: d8fc7d744dce1a2ce9fb4df4bee3aceeafce3b9d SHA-256: 0ca6a1134cf822ffb72a6470ed1015d0682e569e038cbd91cede6260744e4539
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=nccu+academic+calendar+2019+2020+pdf In PDF document text
    • https://bolififona.weebly.com/uploads/1/3/4/3/134316640/2451136.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/dufofugomimod.pdfIn PDF document text
    • https://ganizosu.weebly.com/uploads/1/3/4/4/134434359/dibidijozulax.pdfIn PDF document text
    • https://gixawixo.weebly.com/uploads/1/3/4/3/134322292/jaxozezilig.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/9c2b65ad-022d-4e9b-8150-b4c8ed63f037/67244777238.pdfIn PDF document text
    • https://s3.amazonaws.com/mupudipuvo/cast_of_umbrella_academy_ben.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0724b3d2-aba5-4e09-a57b-2380cb6b7f79/bijotakubezuvusemep.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/download_apk_facebook_lite_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/kenenina.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/elwing_lord_of_the_rings.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_off000047d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47D3 5576 bytes
SHA-256: cfdb82f8519093458288d9b2e55e7b5e9713ed4ce78a57afd308d57316b52581
font_01_sfnt_off00005ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC0 10560 bytes
SHA-256: 9092eb6e9c030f7d131af52d78246a8c763d731291904b63ce5fe2b8d37802b6

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