Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a639fa5515bb83…

MALICIOUS

PDF

350.4 KB Created: 2022-02-26 21:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-09
MD5: c46ac7e5bce64cd76add7859f23159fe SHA-1: 4bd57dfe7880cbaef789e62e19fd2de33e8a6986 SHA-256: 18a639fa5515bb83101ff4a68ea1aa016f5b00bb82531f768bfda236b4ddd52a
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6933

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://mifuj.co.za/XSRYdR1H?utm_term=realidades+2+capitulo+1a+1a-+8+answers PDF link annotation
    • http://frigotechreina.com/userfiles/files/73017877698.pdfIn PDF document text
    • http://carmakers.cz/userfiles/files/57797812098.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/26007871072.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/telinekilidewem.pdfIn PDF document text
    • http://journalstudiesanthropology.ro/adm/jsq/kcfinder/upload/files/22555430346.pdfIn PDF document text
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/razugotozupomamupefosu.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/61587545597.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/78412398836.pdfIn PDF document text
    • https://schoolerp.stembridgelabs.com/userfiles/file/wipozum.pdfIn PDF document text
    • http://toyosupport.ca/assets/kcfinder/upload/files/rikakenotejuvu.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/vepamigerajiri.pdfIn PDF document text
    • http://bwa.olsztyn.pl/bwa3/admin/kcfinder/upload/files/354000518.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/gimetoxirelanukisup.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/51431100732.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161c27898dd4dc---69635068284.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/66366421409.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/posojivosokaba.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/d8014aa7ff03c22844b40bff7d6433d6/putofojijidavesas.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/buvukasuvape.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/bezonameresojimexoma.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/54214573526.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/dolasagabegazobizegoxipa.pdfIn PDF document text
    • http://unitekinfostructures.com/userfiles/file/89190585869.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/49232304010.pdfIn PDF document text
    • http://bizzarro.be/admin/kcfinder/upload/files/64167611362.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 extracted file (font_00_sfnt_off00050a8e.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00050a8e.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00050a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50A8E 17628 bytes
SHA-256: 7a848510195c7454e3f515d56a60b904165449dae49e310687af362eead23336
font_01_sfnt_off000538bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x538BB 11152 bytes
SHA-256: cafb65e6e08aa1ca466ccdf18fc59e25facc94ba7ad45ceca416d16ae8c00456
font_02_sfnt_off0005531b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5531B 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9