Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fcabb9d079f1853…

MALICIOUS

PDF

35.8 KB Created: 2020-03-06 15:52:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5614b2f831b6248a1e9b26d6aeba331a SHA-1: 12985fead5bd05820d834c9fa336c984e11213ec SHA-256: 5fcabb9d079f1853444dd90c8ea49abd6bad4dcb4bbc1d3826702f68399b3f6c
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports this assessment. No scripts were extracted, but the link farm itself is a strong indicator of malicious activity.

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://fun2gotravel.voyagerwebsites.com/uploads/1/3/0/7/130776888/130776888.html#types+of+food+adulteration+ppt
    • http://www.vibrs.com/uploads/1/3/0/3/130312991/5fe92443.pdf
    • http://growthdemons.com/uploads/1/3/0/8/130813521/80c5ec1.pdf
    • http://www.drivingschoollexington.com/uploads/1/3/0/4/130483879/bejujomixoroduk.pdf
    • http://nationals2020.com/uploads/1/3/0/7/130739614/1636938.pdf
    • http://myexplorelive.com/uploads/1/3/0/6/130604332/dulazixiri-jiwas.pdf
    • http://heathfieldconstruction.com/uploads/1/3/0/8/130874111/2988940.pdf
    • http://nirvanasway.com/uploads/1/3/0/2/130272350/e091cf748.pdf
    • http://www.haleysdawning.com/uploads/1/3/0/6/130604646/panosakofilakupu.pdf
    • http://unkledesigns.com/uploads/1/3/0/7/130775897/cae7b2710.pdf
    • http://schooldietology.space/uploads/1/3/0/4/130489229/234991.pdf
    • http://chrissynoelkinslow.org/uploads/1/3/0/6/130640033/lawomilixe-kobil.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064a3.bin
7e9d2945f290a6eb2c8d176b748a9f9a9a215b93367a17d616539a2fdbaca2ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A3 7596 bytes

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