Malicious PDF — malware analysis report

Static analysis result for SHA-256 645b84e56d46451d…

MALICIOUS

PDF

83.9 KB Created: 2021-02-14 04:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 0ace0dcab1a5bbc81970ae75ca4c8cd9 SHA-1: ad701d1ad3388f6ecae64468481f508ae6a68f1c SHA-256: 645b84e56d46451d3995b40e2c28a48010ffd179e2767b648252f849228f6769
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL `https://jottigo.ru/123?utm_term=unite+3+lecon+12+workbook+answers+page+105` is presented as a lure for educational content, likely to trick users into downloading a payload.

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://jottigo.ru/123?utm_term=unite+3+lecon+12+workbook+answers+page+105 PDF link annotation
    • http://domastmsk.space/30573970459my9ib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_60247a822ddf2.pdfIn PDF document text
    • http://luchdobro.site/669580894898eme9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460241/normal_5fc812ddc82ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463810/normal_5fc8bb928251d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387242/normal_6006ea1c6ce35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479451/normal_5fe098aaed560.pdfIn PDF document text
    • http://sojekobab.22web.org/39429536416.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387918/normal_5fc6ff379c7cc.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/sorapobuk/fumomedawevitubuj.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/mudatoxufaz.pdfIn PDF document text
    • http://galexuduxegi.epizy.com/84977313501.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/deroxolowipixa.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/pedigefat.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/maselujila.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/xutelesedafalidadov.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/bluffers_guide_to_cricket.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/23235360491.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/fort_lauderdale_fishing_pier_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/financial_reporting_manager_description.pdfIn PDF document text
    • http://lilivuxaja.rf.gd/62417263507.pdfIn PDF document text
    • http://tumofif.rf.gd/ziwufitedonuxamuso.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_off00010470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10470 6000 bytes
SHA-256: e038198eada67c7135576098e2a4ac0dab0fb1530fdcf24badc80799972c9740
font_01_sfnt_off0001190f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190F 12380 bytes
SHA-256: 55106359506245723e5bec7ff455225868f8f0db47ddf223b4807db13ac3b93c

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