Malicious PDF — malware analysis report

Static analysis result for SHA-256 5330d35adaf84a0b…

MALICIOUS

PDF

72.8 KB Created: 2021-02-03 06:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1fc9f3a3e2669bdf27f103c7b7a2009f SHA-1: 04d6af4399d98d968cc95da9beaf03a24868227e SHA-256: 5330d35adaf84a0b62afa64258c16ee4407c9982462b519e70f7df9cf5697db5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware distribution. No scripts were extracted, but the presence of the external URI and the ML/ClamAV detections strongly indicate a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/123?utm_term=star+girl+ids PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482189/normal_5fd8155706431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478125/normal_60135a658313d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463803/normal_5fd244a652f6d.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/xhhhhjj/craft_automation_coimbatore.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/YQ7ibgh/kibukuxuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495395/normal_5ff1ed8581281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_6013cbe3c913a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375507/normal_6005c905c41fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478141/normal_5fed49799e83d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466367/normal_600e229300b0c.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/hjhfy3s/ball_gun_toy_buy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420743/normal_5fdc679419aba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455681/normal_5ff26d396f627.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449618/normal_5fcea2fb732f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lefemijip/68899267289.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/22663196848.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/antithrombin_deficiency_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/acute_coronary_syndrome_guidelines_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/school_subjects_exercises_elementary.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 4

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_off0000e027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE027 5096 bytes
SHA-256: 5899c209c8ea75b91b63b04e16a3d411702e63bc58fc7aab394aad05e3a36cb5
font_01_sfnt_off0000f188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 10840 bytes
SHA-256: 70ecd92dd24d322c5b2ade008d4c231c9042929723fa2bfe103ef1a6547747f5

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