Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2646faa4d8c33a…

MALICIOUS

PDF

35.2 KB Created: 2020-03-24 05:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 987328f67a0dc21e95912bdfb65c764f SHA-1: 0cabb453fe5ec0c7ec0c1421f66df8c5908cefa8 SHA-256: 6a2646faa4d8c33a41dca5d10ee187f31e602c3e5213d440a1874ed8e042c038
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files and HTML pages hosted across various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the embedded links.

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://aimedonnakelly.com/uploads/1/3/0/7/130740558/130740558.html#concepto+de+tasa+nominal+y+tasa+efectiva
    • http://doublewitch.com/uploads/1/3/0/5/130539344/8749988.pdf
    • http://tradewinrealtyus.com/uploads/1/3/0/4/130483587/5459894.pdf
    • http://negocioscontra.com/uploads/1/3/0/7/130775229/801312.pdf
    • http://hollandmarsh-gold.com/uploads/1/3/0/2/130271152/zudidubo.pdf
    • http://accessdesigngroup.biz/uploads/1/3/0/2/130287419/336fc1825feeb9f.pdf
    • http://hostmaster.praktijkleonora.nl/uploads/1/3/0/2/130272500/fovafo-jalovipogozad-magebites.pdf
    • http://hostmaster.stcm.org.uk/uploads/1/3/0/9/130969137/0d0f2c6.pdf
    • http://modtran8.net/uploads/1/3/0/8/130874610/jutive-mofutusi.pdf
    • http://www.aleciacatron5.com/uploads/1/3/0/7/130739128/xupizogijumezolevo.pdf
    • http://locoskincare.com/uploads/1/3/0/7/130740027/000df4c2d.pdf
    • http://foreverglowspraytan.com/uploads/1/3/0/2/130272260/0e0c2ca28948.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_off000061cc.bin
fb7158f0dfa5aa297388ac06f9b1ec7155ae79899614d3e754713241d48d718e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CC 7792 bytes

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