Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ab5bb72116c8ba…

MALICIOUS

PDF

41.2 KB Authoring application: LibreOffice Draw
MD5: 11f6cf62a50703c77a68ca0db9f68e48 SHA-1: 9c159ed444daa37a5387b919241a070b42def0dc SHA-256: a3ab5bb72116c8ba630a6f4d8aa598cd9ef5fb8c208ccd82436d63aee08bc643
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though partially corrupted, mentions 'Que es contaminacion atmosferica pdf' and includes multiple URLs pointing to PDF files, reinforcing the lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://mosquitomiracle.com/uploads/1/3/0/6/130639267/samabako.pdf
    • http://minigoldendoodlesutah.com/uploads/1/3/0/6/130639477/6804948.pdf
    • http://daniellesmakeupcreations.com/uploads/1/3/0/4/130436307/af70c1.pdf
    • http://ibandmanagerpro.com/uploads/1/3/0/4/130475965/a7cddc1e.pdf
    • http://rivalrygraphics.com/uploads/1/3/0/5/130543543/selufikapunokowubofo.pdf
    • http://blackwoodsounddesign.com/uploads/1/3/0/6/130639025/mewoz.pdf
    • http://nationalfootballcheerleadersalumni.org/uploads/1/3/0/6/130640049/bcf2e58cd.pdf
    • http://kujos.kuhnimsc09.icu/uploads/2020/01/28/304e21bd69fa.pdf
    • http://nuohotel-zh.devsite-1.com/uploads/1/3/0/6/130639249/130639249.html#que+es+contaminacion+atmosferica+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011ea.bin
226893642e1ac96c19ae8445cb071269b1e79862b5d23e14e0e8bd9a8bf1f1f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA 8812 bytes

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