Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5f512b70eed433…

MALICIOUS

PDF

46.6 KB Created: 2020-03-24 13:22:58 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ceec2a9c4224eef2059a9269df941357 SHA-1: 0c38611ba18dab5ae7bed01fdd21f0d91cd4faf0 SHA-256: 5d5f512b70eed433407f1fb0c8cb3d09b0c618134b11e52fb5befa4449c9edcd
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially obfuscated, contains references to 'dreamweaver cc' and 'wkhtmltopdf', suggesting a lure or a tool used in its generation. The primary function appears to be directing users to a network of linked PDFs, likely for SEO spam or to distribute further malicious content.

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://aisthetics.com/uploads/1/3/0/5/130543333/130543333.html#que+es+dreamweaver+cc
    • http://tribemotif.com/uploads/1/3/0/7/130775808/lutovevomav_wagano_dofipakin_wobozizekipawo.pdf
    • http://siouxcitypropainting.com/uploads/1/3/0/2/130272932/3875416.pdf
    • http://sgtreasure.com/uploads/1/3/0/7/130775911/migivadilimut.pdf
    • http://www.dianasdiningtable.co.uk/uploads/1/3/0/5/130551399/8642297.pdf
    • http://oakleykambel.com/uploads/1/3/0/2/130271009/lelefojezesa-sonitubatamid-kozes-mubalosevu.pdf
    • http://lesbontemps2016.com/uploads/1/3/0/2/130271177/5986266.pdf
    • http://tuetinhonline.com/uploads/1/3/0/8/130874614/tujod.pdf
    • http://mail.amiejacobsen.com/uploads/1/3/0/2/130274241/sosivibik_bixujek_kajexofiwipagir.pdf
    • http://www.ameliamohajer.com/uploads/1/3/0/6/130640163/850605.pdf
    • http://golfboardu.com/uploads/1/3/0/6/130620927/553be6a92.pdf
    • http://minutegrillers.com/uploads/1/3/0/6/130603954/c15b42641065b.pdf
    • http://omiluxury.com/uploads/1/3/0/5/130552043/1737115.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_off00008779.bin
059de8d55b897e0f80af7af0e3b42c9e7b63d005430e9d024d0ba0e1ed99dda6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8779 10236 bytes

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