Malicious PDF — malware analysis report

Static analysis result for SHA-256 20539443e192fea5…

MALICIOUS

PDF

365.7 KB Created: 2022-03-31 01:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-20
MD5: 484806e7bc2c7f9e175dfc00ed82f744 SHA-1: a78399f5a7f4feeb21f5260de57372cbfaf8fd1c SHA-256: 20539443e192fea50ce0e2db1889d5de4f0d09a8a59cb43020392cecb4037028
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI and an SEO redirector link, specifically pointing to a URL with a 'free-download' lure, strongly suggests a phishing or scam campaign. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6817

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://sileperu.weebly.com/uploads/1/3/1/4/131406390/f1f2cccb73e8.pdf In PDF document text
    • http://phanvienphianam.com/uploads/userfiles/file/paketesixixonetivovinar.pdfIn PDF document text
    • https://123natura.com/stockages/files/90321214884.pdfIn PDF document text
    • https://womogidukiwu.weebly.com/uploads/1/3/4/8/134873304/rifigo.pdfIn PDF document text
    • https://fetoviwenibade.weebly.com/uploads/1/3/4/7/134701039/6983800.pdfIn PDF document text
    • https://sokifaxus.weebly.com/uploads/1/3/4/6/134666683/jojowidirimojuwo.pdfIn PDF document text
    • https://gyogytorna-vac.hu/admin/kcfinder/upload/files/14926516355.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/kulivofavotelupepobikef.pdfIn PDF document text
    • https://ccar.host168.com/data/fckeditor/files/86771738068.pdfIn PDF document text
    • https://xowavitidew.weebly.com/uploads/1/3/4/3/134381641/folawunenuwod.pdfIn PDF document text
    • https://kuzosilu.weebly.com/uploads/1/3/2/8/132815793/572738.pdfIn PDF document text
    • http://program-pro.ru/userfiles/files/1903254725.pdfIn PDF document text
    • https://tubanepa.weebly.com/uploads/1/3/2/7/132740320/d439d5434c.pdfIn PDF document text
    • https://lidubudizut.weebly.com/uploads/1/3/2/8/132815063/82b16da5.pdfIn PDF document text
    • https://duvedibis.weebly.com/uploads/1/3/4/1/134131600/lasajavol_putijabal_rufaj_kowob.pdfIn PDF document text
    • https://loyq.ru/admin/upload/photos/library/files/natotuboguwesitobewosip_1644987780.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/162290f9d425b8---vususavuguwesizajok.pdfIn PDF document text
    • https://pixigakamorage.weebly.com/uploads/1/3/4/3/134351623/wilid_zopex_firokexusafojo_gajavur.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1621a793c5fbbc---84925669100.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/80579738171.pdfIn PDF document text
    • http://meguro.pl/www/js/kcfinder/upload/files/zodiw.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/87904013410.pdfIn PDF document text
    • https://kuwaitpolyurethane.com/ckfinder/userfiles/files/wepumotubodivoberor.pdfIn PDF document text
    • https://febrerasesores.com/uploads/kcfinder/upload/files/kezupux.pdfIn PDF document text
    • http://www.og2c.com/images/file/45528051144.pdfIn PDF document text
    • https://konferencia2014.medius.sk/userfiles/file/32832964188.pdfIn PDF document text
    • http://reputesystems.com/app/webroot/uploads/files/58716315944.pdfIn PDF document text
    • https://birivisixakaxe.weebly.com/uploads/1/3/4/6/134608058/pibujaroxixovep.pdfIn PDF document text
    • https://xokodozavujug.weebly.com/uploads/1/3/5/3/135343923/waboxi.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/zabutezizitibijosum.pdfIn PDF document text
    • https://dururamud.weebly.com/uploads/1/3/4/8/134846475/351e665.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/zekagovixetawumoziretukoz.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/fetaxereniwigefikuremo.pdfIn PDF document text
    • http://ilpiccantino.it/admin/data/img/uploads/files/6092397204.pdfIn PDF document text
    • http://vidol.eu/userfiles/file/jizinubowekerase.pdfIn PDF document text
    • http://eintracht-bayreuth.de/kcfinder/upload/files/bobalasojeva.pdfIn PDF document text
    • http://panelko.hu/files/files/melafenudufarenutul.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/40139718482.pdfIn PDF document text
    • https://www.pkkmaluku.org/berkas/plugin/ckeditor/kcfinder/upload/files/63820440036.pdfIn PDF document text
    • https://ragaz.co.za/XSRYdR1H?utm_term=speak+english+like+a+native+american+pdfPDF link annotation
    • 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 extracted file (font_00_sfnt_off00054580.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00054580.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54580 11180 bytes
SHA-256: 7863937ac670cb7011cede949983d345f1b2fa43b8cd65c2fda891585736deb2
font_01_sfnt_off00055f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55F44 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off0005765f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5765F 18596 bytes
SHA-256: 3c1523f4848bf1355b29a0c39e96c53b4f690f275f6d943e8d7bc46eb6e67b07