Malicious PDF — malware analysis report

Static analysis result for SHA-256 4453382388e0a71c…

MALICIOUS

PDF

344.5 KB Created: 2022-04-14 03:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: ec366582602e53d486d023a06c447f8e SHA-1: 7cdc3dddd8baaaf0dabce0becf05af844cfa0d8b SHA-256: 4453382388e0a71c7c6f94f55520897d8128fd6d8be99a8b45bc05a99a3b8bb1
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI and a specific heuristic firing indicating it's an SEO redirector link used for phishing, disguised as a free download. ClamAV detection further confirms its malicious nature. Although no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7583

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://wirut.co.za/XSRYdR1H?utm_term=spies+like+us PDF link annotation
    • http://vet-spb.com/userfiles/file/14084621262.pdfIn PDF document text
    • http://a899.net/userfiles/file/pibeletugupomupa.pdfIn PDF document text
    • https://oceanflowerhotel.com/uploads/image/files/24785260464.pdfIn PDF document text
    • http://adm-zhemtala.ru/files/files/vonudipumivadip.pdfIn PDF document text
    • https://beds.lifelinecenters.com/news_items/file/5063766562.pdfIn PDF document text
    • http://salda.se/saldus/kcfinder/upload/files/gemenugijupol.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/36009887348.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/63349676999.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/94452458989.pdfIn PDF document text
    • https://xudepafuvinuk.weebly.com/uploads/1/3/0/9/130969511/2904174.pdfIn PDF document text
    • https://landviewdesign.com/userfiles/file/pewitofajinawovinu.pdfIn PDF document text
    • http://elixiriso.com/kcfinder/upload/files/20363946965.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20220314115817.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/12948719918.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/wesesodipivulelobopumog.pdfIn PDF document text
    • http://neogmbh.de/www/sites/default/files/userfiles/file/fojoguna.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/59159565848.pdfIn PDF document text
    • http://primewritings.grand-essays.com/media/uploads/files/12431221483.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/33008541906.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/91820617736.pdfIn PDF document text
    • https://kunipasufit.weebly.com/uploads/1/3/0/8/130874165/pasufezufuxom_zoditadiviti_jojofazozodosa.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/tuzalulekanudefipevun.pdfIn PDF document text
    • http://theexplorerthai.com/userfiles/files/bodebiwo.pdfIn PDF document text
    • https://rokaxitifefisol.weebly.com/uploads/1/3/4/0/134040577/7921169.pdfIn PDF document text
    • http://formanwoman.ru/userfiles/files/dizemamutopixor.pdfIn PDF document text
    • https://vitebikune.weebly.com/uploads/1/3/4/8/134895950/4191984.pdfIn PDF document text
    • http://mottohub.com/multimedia/userfiles/file/mokiwojisowasotadepubogat.pdfIn PDF document text
    • https://dudiretoziruk.weebly.com/uploads/1/3/0/7/130739928/dasutimoj_duzedijolor.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004f680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F680 17952 bytes
SHA-256: ad316e5b81e04da9f30a576235b2ca812c72d459d15e270a0ea16e20c5282335
font_01_sfnt_off0005253a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5253A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00053d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53D50 9928 bytes
SHA-256: df7f10162c07c814bedad5a07e12d84caf0a5ede2e48e4579227f8e6ce0d643d