Malicious PDF — malware analysis report

Static analysis result for SHA-256 4453ce0a402c84be…

MALICIOUS

PDF

63.9 KB Created: 2022-04-17 06:35:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: c8f58a6bd7be032507ded80f89c86dff SHA-1: ffd19b5e738ece412ebb2a1766b985473686987f SHA-256: 4453ce0a402c84bead29c3ef52be913347dd6fe7bcf659168c00c9693239f5db
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous external URLs pointing to various domains, likely to manipulate search engine results or redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and the presence of many external links suggest it's designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://norin.co.za/YmrXLWy8?keyword=practice%204.2%20triangle%20congruence%20by%20sss%20and%20sas%20worksheet%20answers PDF link annotation
    • https://sufexijim.weebly.com/uploads/1/3/4/6/134679247/barewedarijofutepuje.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/xoxiritamobomiwitipad.pdfIn PDF document text
    • http://arkapizzeria.com/kcfinder/upload/files/15379772565.pdfIn PDF document text
    • https://kesetemokeze.weebly.com/uploads/1/3/2/6/132682820/a48ff.pdfIn PDF document text
    • https://dapalijika.weebly.com/uploads/1/3/0/7/130738969/rovavorutivin_kupazasilu_josofu.pdfIn PDF document text
    • https://lonomunemol.weebly.com/uploads/1/3/6/0/136082408/todesibisiras_riwabalok_nuxufizokeminu_tozinojanuvumup.pdfIn PDF document text
    • http://adaptiv-rb.ru/uploads/files/kojadomagilanil.pdfIn PDF document text
    • https://fubewewafipox.weebly.com/uploads/1/3/0/8/130874235/dokivasilix-folopulu-xarirupaken.pdfIn PDF document text
    • https://thenovgorodspaceship.andreirozen.com/images/files/37621911559.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/zekafuvepeba.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/62277890967.pdfIn PDF document text
    • https://fawitazekivaji.weebly.com/uploads/1/3/1/4/131454143/6340e.pdfIn PDF document text
    • https://wofuzokekaxan.weebly.com/uploads/1/3/4/4/134465278/wavitukilomijukapik.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/gilefomowivewabadel.pdfIn PDF document text
    • https://futilupotozuvat.weebly.com/uploads/1/3/1/4/131454482/6717039.pdfIn PDF document text
    • https://wivapitawipalex.weebly.com/uploads/1/3/2/6/132682528/nufokuguzu_junakofojeg_rupupurinul_vefepuwejoruka.pdfIn PDF document text
    • https://bufagigakumeg.weebly.com/uploads/1/3/4/3/134313452/newixixebekete-zuluzozekepokoj.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/93157328958.pdfIn PDF document text
    • http://air-separation-supplier.com/d/files/57662712677.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_off00009826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9826 11448 bytes
SHA-256: f7bd3aa5cacee4b610fa58bbc0b3beb96ed5db5f33d8a74c9e5dbb22bbf58b67
font_01_sfnt_off0000b314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB314 14996 bytes
SHA-256: 74101ea408b0e79a618b99dd2672729f0d2eaca5bd30996535d54d500d341822
font_02_sfnt_off0000d968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD968 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1