Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a4609d9b681a30b…

MALICIOUS

PDF

72.4 KB Created: 2021-02-15 19:33:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 572030c4004ebf020bf7c1afa735881b SHA-1: 09ff8ba91f4e939378ec7e6d5cf03092d4b85ebf SHA-256: 0a4609d9b681a30bea9aaa28793e3e1b09bbe31b8a5dcc5de4cb2816b1c32e6f
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO-optimized redirectors, suggesting a phishing or content-scraping operation. The primary lure appears to be a 'Hogwarts school supplies letter', which redirects to a URL containing a keyword search. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/wix?keyword=hogwarts+school+supplies+letter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494868/normal_6004badf60e88.pdfIn PDF document text
    • http://forpost-electrica.ru/binary_to_denary_worksheet_with_answersxmrs3.pdfIn PDF document text
    • http://osmosiotzs.fun/mothercare_baby_car_seat_manualtfcgm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424013/normal_60006a7fb0e6f.pdfIn PDF document text
    • https://sudarotabodubig.weebly.com/uploads/1/3/1/4/131407445/818650.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393639/normal_5fcd3e8e95716.pdfIn PDF document text
    • http://streichpack.online/6253078273zkuq0.pdfIn PDF document text
    • http://instasurprise.online/glo-_bus_simulation_quiz_1_answers28syb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487431/normal_60182ed4e4706.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450139/normal_5fde93241f288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470038/normal_5fd930397f723.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460066/normal_5ff714cd3870a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382618/normal_5ff88d378b578.pdfIn PDF document text
    • http://lirelejavebot.iblogger.org/nifekujatojezuzomusid.pdfIn PDF document text
    • https://kujakaxu.weebly.com/uploads/1/3/5/3/135347331/9880504.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sijisizaf.rf.gd/convert_in_to_word_document_online.pdfIn PDF document text
    • http://guzedero.rf.gd/bangladesh_vs_england_weather_report.pdfIn PDF document text
    • http://pibekolovaxizon.epizy.com/24243704735.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_off0000df54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF54 5248 bytes
SHA-256: 3224640cbdc8b51f55febe2eb729a5a23f68d605579493ed231627201b7ba061
font_01_sfnt_off0000f13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13E 10396 bytes
SHA-256: 9a69613bd4f01262852b43b515988304d9e28632790c44b557f6623f1012bc24

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