Malicious PDF — malware analysis report

Static analysis result for SHA-256 854e2df0a1f2dd16…

MALICIOUS

PDF

52.8 KB Created: 2020-04-10 03:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9e6a7c68f827021bfd2649bcc23bd27c SHA-1: ccaf1f66b064b8ae780827d4ad4dc2c8bc6ea239 SHA-256: 854e2df0a1f2dd16e2d3b5d777af2fed205781a784f5b86a5af22935558c76e6
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, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially corrupted, includes a URL that is also listed among the extracted URLs. This suggests the document's primary purpose is to redirect users to a network of external sites, potentially for SEO spam or to host further malicious content. No scripts were extracted, but the presence of numerous external links points to a content distribution or redirection attack.

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://oxnarddj.com/uploads/1/3/0/5/130546343/130546343.html#dibujo+de+un+cuerpo+humano+para+colorear
    • http://csaprevention.com/uploads/1/3/0/7/130775539/dikavewenij_rigogizikudeka_voxekuduwi_lakuvavawikon.pdf
    • http://dreamcityhealing.co/uploads/1/3/0/9/130969045/xesimigaler.pdf
    • http://americanpastimebaseball.com/uploads/1/3/1/4/131437657/7104395.pdf
    • http://durockceramics.com/uploads/1/3/0/3/130323190/690cd6f390.pdf
    • http://eldredcinematiccritic.com/uploads/1/3/1/4/131453119/12e0c21e968c.pdf
    • http://truecarehawaii.com/uploads/1/3/0/5/130588731/7f6d341f17f2f74.pdf
    • http://mariasblueridgemountainhoney.com/uploads/1/3/1/1/131164375/c4c6de11e.pdf
    • http://albertfigueras.eu/uploads/1/3/0/9/130969048/8561242.pdf
    • http://themagadanmission.com/uploads/1/3/0/6/130639656/dafedegawewovor.pdf
    • http://proballerreport.com/uploads/1/3/0/6/130639294/nirozodigujino.pdf
    • http://jkacampsie.com/uploads/1/3/0/6/130621043/fotanewevedumetogi.pdf
    • http://luvsheascloset.com/uploads/1/3/0/6/130605143/7936317.pdf
    • http://rspmadison.org/uploads/1/3/0/6/130621832/04f485a8dbd5f.pdf
    • http://landontroyerdesign.com/uploads/1/3/1/6/131636929/82142aba4.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e12.bin
ff9b5974555927c75f9f16374417e536370e8fa7d8352a7e50f0047cf05af8d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E12 9256 bytes
font_01_sfnt_off0000af2d.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF2D 16036 bytes

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