Malicious PDF — malware analysis report

Static analysis result for SHA-256 77bad9125b2be8f5…

MALICIOUS

PDF

36.1 KB Created: 2020-03-21 13:10:45 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 25453dd45453b59112d7b1c419d96e03 SHA-1: 036374c426c42bd365f9128802f8a4ca39c530a8 SHA-256: 77bad9125b2be8f5dc25313a102e4795edaf673ad22369d85e1f07be28faaded
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external websites, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests an attempt to direct users to potentially harmful content or phishing sites. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://evokefitness.net/uploads/1/3/0/4/130489342/130489342.html#industrializacion+e+imperialismo+mapa+mental PDF link annotation
    • http://kathiegreenmedia.com/uploads/1/3/0/6/130620877/xujulinomoripewukaf.pdfIn PDF document text
    • http://www.renewnow.me/uploads/1/3/0/5/130538839/3399786.pdfIn PDF document text
    • http://steambathparts.com/uploads/1/3/1/0/131070238/e1aaeda3f72aba.pdfIn PDF document text
    • http://totalhealthandhomewellness.com/uploads/1/3/0/7/130776344/kamilabinexi.pdfIn PDF document text
    • http://northstarmuseum.org/uploads/1/3/0/2/130287314/ditujepu.pdfIn PDF document text
    • http://hmsyearbook.com/uploads/1/3/0/8/130813650/6772267.pdfIn PDF document text
    • http://sojusurvivor.com/uploads/1/3/0/5/130589450/3429691.pdfIn PDF document text
    • http://www.svetsatku.cz/uploads/1/3/0/5/130590278/6890661.pdfIn PDF document text
    • http://newvisioncrane.com/uploads/1/3/0/9/130969336/1588809.pdfIn PDF document text
    • http://www.cojoworldwide.com/uploads/1/3/0/8/130813369/8900279.pdfIn PDF document text
    • http://propodcastcontrol.com/uploads/1/3/0/6/130639972/9951430.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6643 7968 bytes
SHA-256: 1abd12036b71b9f44cf7bf66fd1f6e3d1237a2af2a7e92333518dbf8d4844b7c

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