Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1e827396737aa7…

MALICIOUS

PDF

73.1 KB Created: 2021-02-04 23:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 9040473e8c4445fb65d4674baabea746 SHA-1: b4356a3dd7747b6d19b15c923a59b4fe660b0541 SHA-256: ec1e827396737aa716471aa573aa2467e8a64f89d99be20ec9228dca4c0e30c7
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an external URI and a redirector link that points to 'https://jacksth.ru/123?utm_term=the+bronze+bow+free+pdf', suggesting a phishing or malware distribution lure. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of redirector links strongly implies an attempt to lead the user to a malicious site or download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/123?utm_term=the+bronze+bow+free+pdf PDF link annotation
    • https://cdn.sqhk.co/pukazibat/v8Iivhf/41840106956.pdfIn PDF document text
    • http://ch-redirect.icu/exercice_excel_2010m1hcr.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/gerEmPt/75834651205.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/hg4N1qt/57441909599.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496165/normal_60089dcdcbbc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392193/normal_5feb5d1bebe36.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/WWBO7e5/paul_hardcastle_19_music_video.pdfIn PDF document text
    • https://cdn.sqhk.co/dabeluza/Pgc4bgY/good_captions_for_instagram_selfies_guys.pdfIn PDF document text
    • http://heleogose.online/myth_of_sword_eng_subevqxc.pdfIn PDF document text
    • http://mazafaka69pussy.online/zejikijiverabowrare9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485693/normal_5fec4448bb65e.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/jixerubowi/blueprints_obgyn_free.pdfIn PDF document text
    • http://diveruwafulebes.epizy.com/jacoco_report_aggregate_gradle.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_off0000e267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE267 4940 bytes
SHA-256: 16830ea83f112ad4afb939fe47dd3c78ae2210dc4ce4798e2ab59757cfaf5fee
font_01_sfnt_off0000f344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF344 10616 bytes
SHA-256: f454732ea961da1125c52d45e3508bbcba6a16942aa1bad098f7a7c9494a6d11

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