Malicious PDF — malware analysis report

Static analysis result for SHA-256 20553aa5635538e9…

MALICIOUS

PDF

69.8 KB Created: 2020-11-29 15:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6edc021ad04445e4a6c0031a59d76503 SHA-1: 26618f93cb12be9977c0ae165f358ca75cc80135 SHA-256: 20553aa5635538e9cec3b41983c018e748e76c743faef1a165f08a87351189ec
154 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 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 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=hoover+spinscrub+60+carpet+cleaner+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f89aee75249f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379618/normal_5fa6eb973ff5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444095/normal_5fb2d02e533cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5fab35794b0e4.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://s3.amazonaws.com/xarojapi/75695566869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c00912e-42c8-4000-9f9b-de7febe75816/minemujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14293d79-5632-43a4-8115-2977b829f852/31083318658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4e893b-09f5-415f-9c17-5a77b33e6f90/wedetoworopazupepixivili.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/rujabasobapubinin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc19edf9-142e-4b28-b61b-5cb568af7aa1/40537906790.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/89922181565.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/87432874834.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 2

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DC 5264 bytes
SHA-256: 2d49ddaccadbc21b6479090dac52a7ea8d264d342fe05d94268e73d3fa9ce900
font_01_sfnt_off0000d9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C8 10116 bytes
SHA-256: 4f0a81fb441ec4d6ef18e0d29f035c0551112ddc2406df8123745f3aaa98bd6e
font_02_sfnt_off0000fc14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC14 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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