Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ebeb97db20d9c3…

MALICIOUS

PDF

67.2 KB Created: 2021-01-02 12:58:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7f378c46a26031ff6794236b8fa0f7a9 SHA-1: 14395bdf9e043006258f5c8eed714007e4d09588 SHA-256: 70ebeb97db20d9c3344caaefdae481f1f52da46abf3010765c4df4b0a0df132e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffset.ru/aws?utm_term=bleach+vs+naruto+3.+9+apk PDF link annotation
    • https://cdn.sqhk.co/fejavegiwo/hgGOhf3/download_dragon_hills_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/haihhdm/94166858114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450417/normal_5fa854e0a296c.pdfIn PDF document text
    • https://wuserugojikenek.weebly.com/uploads/1/3/4/5/134513610/nebegi_difog_xanowaxiga_tojixazanana.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450034/normal_5fcf1fc7c503c.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/d4bd7784-56f6-4f1b-8c13-8c7438fb4a7e/foothill_middle_school_discord.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ad7cff-0c58-4910-8d60-44b913157a99/93213581922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05f224f9-db2a-41aa-be6f-9cfee1ac092d/heroine_shikkaku_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/vagawozopute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3795de69-7475-496d-8864-4b659971b76f/rewido.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_off0000c8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EB 5548 bytes
SHA-256: e35ccae84c2a00f213ceb4898f4fd66e68b86b64a7d1353a7ef2320eabef802c
font_01_sfnt_off0000dbc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC3 10684 bytes
SHA-256: 147892d8629801e62b1a87b061bb2ed926d31219019bc4e6c9a5144e0f250bc7