Malicious PDF — malware analysis report

Static analysis result for SHA-256 445c589d528c8a8d…

MALICIOUS

PDF

372.4 KB Created: 2022-04-19 11:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: d665a4671610cafe41109387fa2b8f42 SHA-1: c6cba481dfcc22c09f036f2ba1431ab360da6c3a SHA-256: 445c589d528c8a8d1e8f2b7079a1fc49a166f82c44d2b2ee93f7fdb9c66b0749
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ClamAV as a phishing trojan and ML classifiers indicated maliciousness. It contains a high-risk heuristic for an image lure linking to an SEO redirector, specifically 'https://sunuf.co.za/XSRYdR1H?utm_term=android+webview+adjustpan+not+working'. This redirector likely serves as a gateway to a phishing page or a malware download, aligning with the 'Spearphishing Attachment' and 'Exploitation for Client Execution' techniques. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8329

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://sunuf.co.za/XSRYdR1H?utm_term=android+webview+adjustpan+not+working PDF link annotation
    • https://bejofiba.weebly.com/uploads/1/3/7/5/137501455/jutufez.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/b14a19f6968c948e3f4c1d7771939612/46580471007.pdfIn PDF document text
    • https://insetclean.com.br/kcfinder/upload/files/90749714662.pdfIn PDF document text
    • https://aytuglu.net/kcfinder/upload/files/zukuwalulonu.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/vetesazazomipawemabileto.pdfIn PDF document text
    • http://razvoj.e-podjetnik.com/ckfinder/userfiles/files/392021795.pdfIn PDF document text
    • https://mitadelo.weebly.com/uploads/1/3/4/7/134712934/62f8303242cd6.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/89416963728.pdfIn PDF document text
    • https://velijodot.weebly.com/uploads/1/3/6/0/136004489/ce90f93aba4.pdfIn PDF document text
    • https://texexodova.weebly.com/uploads/1/3/0/9/130970004/xazad_ripum.pdfIn PDF document text
    • http://skalamatbaa.com/userfiles/file/68620656749.pdfIn PDF document text
    • http://luligang.com/ckfinder/userfiles/files/363823709.pdfIn PDF document text
    • https://motaxajofepox.weebly.com/uploads/1/3/1/3/131381237/690724.pdfIn PDF document text
    • https://fawubanine.weebly.com/uploads/1/3/4/3/134321827/jeripibub-wupebimat.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20220203015744168.pdfIn PDF document text
    • https://kezobonuduwu.weebly.com/uploads/1/3/4/4/134457579/raxugij_mopovitax_webesulo_bejelexulawomi.pdfIn PDF document text
    • https://skidnapping.com/uploadfiles/files/35167066626.pdfIn PDF document text
    • http://bxbrdh.marketsearching.com/upload/files/gewalibadi.pdfIn PDF document text
    • https://xokapajutubesa.weebly.com/uploads/1/3/4/7/134730315/4672760.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_off000561a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x561A2 17860 bytes
SHA-256: adf7cba9aa70e600cc7b6de1381e4cadb0f799c3da7a94a89509bd78a17bed2a
font_01_sfnt_off000590be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x590BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0005a8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8D5 11116 bytes
SHA-256: d0eb8009078fc67eef285d3057ff9195491efdfaba936d1448da294800ea51c2