Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a6aa1555ee0222…

MALICIOUS

PDF

69.5 KB Created: 2020-11-25 23:12:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e21f6c04c0c3fb2dba3a5942e7f44f7d SHA-1: 95065899ce71bb6bac0be4af93abb0fbe5c57b67 SHA-256: 95a6aa1555ee022200aa7d7d8e4a62b4d06b8fc4537790bb8f2871fad91ea096
214 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 and 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 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
  • 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.
  • 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.
  • 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=24h+games+unblocked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5f8d05e77ee63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_5f9e052a47d1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376874/normal_5f9f585397870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417032/normal_5fbeab9a8132d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_5f9838767e5f2.pdfIn PDF document text
    • https://nimimemuxigu.weebly.com/uploads/1/3/4/4/134488465/pomazogelasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453907/normal_5fb001aa93fea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5f93a69a4e3ea.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/jadere/32959380104.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/47110370382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c38e79-525b-4bcb-89f2-604033755544/smoke_hollow_es230b_digital_electric_smoker_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

Related samples 8

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_off0000c4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E3 5340 bytes
SHA-256: 36aebb0d59337afef185a7eb64f549772a324e592a5dc18c05ccf9db9b83aa4b
font_01_sfnt_off0000d6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DA 10860 bytes
SHA-256: 8f0028da9680fe5231c20923a4de6281c5223d86c5a66b9b94925faf6d881ad5
font_02_sfnt_off0000fb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB99 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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