Malicious PDF — malware analysis report

Static analysis result for SHA-256 4258fabefd91adeb…

MALICIOUS

PDF

67.9 KB Created: 2020-11-24 17:37:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 462bb584a1ef72028a54624bd7327c2f SHA-1: c91776fa9c18f75b05dc35bd639ef4eb5c76e07d SHA-256: 4258fabefd91adeb76ebe26096b41aa7bf81cbf88b101cdeafa577129361e5f6
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a password-protected archive lure further supports the hypothesis that this document is a precursor to a more significant payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?utm_term=google+chrome++64+bit+windows+xp PDF link annotation
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/e75bb471e01d5.pdfIn PDF document text
    • https://xuzutewoduka.weebly.com/uploads/1/3/4/3/134364923/katomuze.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/c68dc6c3-c703-4d41-9f46-27c3f75ccf25/69670006714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/583ef9e8-7549-4ccf-8d03-0e3cc6e89592/wimusedalojivazumofewega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b30b440-8277-4ecb-ba2e-a2200b8e6627/carne_de_cerdo_al_horno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38825cf7-5e6a-45f8-9260-aa14badf153a/bunivinifikudigatonun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f79bc4-0249-45a9-8473-146eaf86e255/26678059130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c3cbbec-61fc-4a83-90de-95f0a52b2cb6/bountiful_high_school_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b87189fc-ecf6-4c0c-aa63-4a8edd58e506/8277894368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b021603-0c41-4c56-9805-8b7b20f76990/gregg_style_manual.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_off0000cbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBF 5852 bytes
SHA-256: 36447d35b53b7babe6224168b608e5d477e89fa399341ae03e8e35c8a2152da9
font_01_sfnt_off0000df9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9D 10368 bytes
SHA-256: 49b1e7537011647e349390de7fe2bb72f99f7d06e6efd1e0e6ca90a9b82e2f15

Open this report in the interactive analyzer, or submit your own file for analysis.