Malicious PDF — malware analysis report

Static analysis result for SHA-256 de435734bf877af8…

MALICIOUS

PDF

435.3 KB Created: 2022-04-22 03:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-03
MD5: b162f6196bc173e802c3dc4b27ce7f94 SHA-1: 3d65e3dec5786caf8f25d1460c483aba4d3209a5 SHA-256: de435734bf877af863dc2b7bbc2c659ad135536421d9997bbba4fc7aecbfb173
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. The document contains numerous links, including an SEO redirector, that point to other PDF files hosted on compromised websites or file-sharing services. The primary lure appears to be a link farm designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5836

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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://loheb.co.za/XSRYdR1H?utm_term=letter+asking+information+and+assistance+sample PDF link annotation
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/49400970260.pdfIn PDF document text
    • http://buddhavihara.net/userfiles/file/78353367423.pdfIn PDF document text
    • https://mudobimug.weebly.com/uploads/1/3/4/8/134853100/kufozoloj-porubisitaz-lolur-wowax.pdfIn PDF document text
    • https://vazigawexike.weebly.com/uploads/1/3/1/6/131606690/9eed72.pdfIn PDF document text
    • https://mufudenufasos.weebly.com/uploads/1/3/4/4/134492520/cdf1a8d30.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16242d52d170c1---puziveguvi.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/zipefebo.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/58309268784.pdfIn PDF document text
    • https://vuvofazomegudej.weebly.com/uploads/1/3/4/3/134329778/woxelisuradopofito.pdfIn PDF document text
    • https://fipubizibogu.weebly.com/uploads/1/3/0/7/130775584/guleb-kiwozudelu.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/vinegav.pdfIn PDF document text
    • https://fanizoliboligom.weebly.com/uploads/1/3/1/0/131070566/bijod_lakakerafuf.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/ratapabozabage.pdfIn PDF document text
    • https://rioclaro.com.co/kcfinder/upload/files/82534190633.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/kenukofanu-bukanoselesalu-fifekuro.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16240a77cc376c---12417997475.pdfIn PDF document text
    • http://everestsherpatravel.com/demo/public/ckeditor/kcfinder/upload/files/jifokavoditimeliri.pdfIn PDF document text
    • https://htkvn.vn/public/admin/plugins/kcfinder/upload/files/47962632295.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/mikogajipigabevovikewiko.pdfIn PDF document text
    • https://ravagowezotivix.weebly.com/uploads/1/3/6/0/136094193/xepegadavififabi.pdfIn PDF document text
    • https://vos-web.nl/userfiles/file/putulalumamevijegibe.pdfIn PDF document text
    • https://zejafopo.weebly.com/uploads/1/3/4/5/134505046/5481062.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/2660003c60cdb464096c619307b3ec1b/28438615019.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/daduzilova.pdfIn PDF document text
    • https://kisotupojez.weebly.com/uploads/1/3/4/4/134493444/puwaguvesopoke.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_off00065e2c.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00065e2c.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00065e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E2C 18188 bytes
SHA-256: a88e507075822b058955aa221543bdd4f00b49723da6a4f4bf75849036bcbf09
font_01_sfnt_off00068cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0006a4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4DA 11012 bytes
SHA-256: 310cdd55bcfbe5f9cc12e84ef859dee55ad717928482c15ce4b4484d12ca2174