Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec252f214de21ec…

MALICIOUS

PDF

36.9 KB Created: 2020-04-05 07:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 29cacf337f37f9da76afe5e177d6c2c9 SHA-1: 675d3364f28485305a3d8962efa3d60848943bca SHA-256: 3ec252f214de21ec110b41aa48861d38b3613bcacafe7390afe86d2de3cd5d57
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO spam or to direct users to malicious websites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a likely attempt to distribute content or traffic to a network of linked sites. The ML classifier also strongly flagged this PDF as malicious.

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://whatnourishesyoullc.com/uploads/1/3/0/5/130551116/130551116.html#ensayo+sobre+la+segunda+revolucion+industrial
    • http://consciouscounselling.org/uploads/1/3/0/6/130639161/xonarabibover.pdf
    • http://americanfiresuppress.com/uploads/1/3/0/4/130477335/d4968a072.pdf
    • http://simonjohnsonproductions.com/uploads/1/3/0/6/130620843/9f971143efbbf.pdf
    • http://catscardsandcoffee.com/uploads/1/3/0/5/130550723/pifogeve_janafajamiser_sopijaj_kukutodolezizu.pdf
    • http://tast7.com/uploads/1/3/0/6/130604249/779a63e483f9c.pdf
    • http://spotlight-specials.com/uploads/1/3/0/6/130621461/5827185.pdf
    • http://penelopehair.com/uploads/1/3/1/3/131380547/vojatodamavigisu.pdf
    • http://americasawaycolors.com/uploads/1/3/0/2/130270951/tenibivaladerejovix.pdf
    • http://artbykaye.com/uploads/1/3/0/5/130590051/vimod-namibozurofaxuj-jugomifezof.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_off00006566.bin
e6ff329e0f970dea6828e003278eae01fb4c483a1b2b688bd8ba8ec2994a5133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6566 8884 bytes

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