Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75a91b66b386ac6…

MALICIOUS

PDF

76.1 KB Created: 2020-11-30 12:04:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e9ca77a05b724a921219fbdbd027cad7 SHA-1: dd548fe141850c4808a3c85f19fddd40e028c9a0 SHA-256: b75a91b66b386ac692b0f536973ca1ada40ff81577861a1ad031ec71647e07b7
156 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 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 0.9998

Heuristics 5

  • 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.
  • 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/strik?utm_term=vhl+answers+spanish+2 PDF link annotation
    • https://vuzejugusu.weebly.com/uploads/1/3/4/4/134486163/7e55df2b054904.pdfIn PDF document text
    • https://rurasudi.weebly.com/uploads/1/3/4/4/134485231/4472734.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0d6fc7afe470b5589e77/1606225263751/wepazezexopitapebitosir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a964b1e-d447-42e5-bd8c-c15dfce99abd/agile_project_management_framework_p.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0cf4f81c9a2a0c699ada/1606290677179/nefipum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa94b63-f68a-40f6-8c80-b93d0de27d21/kadagolizedazojavafagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f44065-9792-47e8-9fbc-3b3b17f7fa64/zosamaravafetudano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ea8ff6d-868d-4253-948e-5107db53a591/xegitadafaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e395f028-5441-470f-ad47-13dbbf01e4c5/33313158240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2325ec58-401a-4bb8-a2ef-09904f3fde5d/21065667944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd8acf1-ff75-44bc-bdbc-d32e40df9bdb/wumatavofeliwasipekapapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3fc6d45-91fb-4f39-a1b5-56e2f983a605/9.snf_corafya_ders_notlar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a30c7bb9-2658-4b0b-b53a-fb0cfe88e0dd/seussical_songs_lyrics.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED88 5096 bytes
SHA-256: 51dc0154922cd2438a17a087847eed41dfe35199bd13951fccfa2f885051d438
font_01_sfnt_off0000feec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEC 10916 bytes
SHA-256: 30026182417ed9f7233bac50c157fcaec8c89d9a632625951c2dae0f8de6e684

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