Malicious PDF — malware analysis report

Static analysis result for SHA-256 f564a4d5f3450a28…

MALICIOUS

PDF

41.5 KB Created: 2020-04-13 22:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 725914180d114321d108be644fb6105b SHA-1: 94066ad9fd3992b489956a7796d69038d31b5f98 SHA-256: f564a4d5f3450a28397b2703f6c7b1e44a2a409e761958f213e08cf6fb98b97f
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, indicating it is part of a link farm. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a physics topic, suggesting a lure to a website. The primary heuristic firing indicates a mass external PDF link farm with 30 links, suggesting a malicious SEO strategy.

Heuristics 3

  • 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
  • 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://misbailes.com/uploads/1/3/0/7/130738700/130738700.html#capacitor+and+capacitance+problems+pdf
    • http://kingwoodconcretecontractors.com/uploads/1/3/0/7/130738806/topujaxixo-goxoti-kagegolamele.pdf
    • http://miabek.com/uploads/1/3/0/5/130550846/a0c410768d15db.pdf
    • http://positiveeventspartnership.com/uploads/1/3/0/6/130640162/fonozuxiru_xavewigogexu_posowagakokeb_negezixe.pdf
    • http://geonicmineralen.info/uploads/1/3/0/6/130621552/farivirabefaja.pdf
    • http://thecapehomerepair.com/uploads/1/3/0/5/130542920/zamagu_kunonepipuvobo_begodituzodulo_vawunubale.pdf
    • http://seowenscompany.net/uploads/1/3/0/5/130588512/litelugomabefap.pdf
    • http://evawille.com/uploads/1/3/0/7/130739351/1b236.pdf
    • http://believe-create-inspire.com/uploads/1/3/0/6/130621179/marovupoxi_dakezidositekam_sedufudafoma.pdf
    • http://rena.website/uploads/1/3/0/2/130289652/tuxodipusowi_zirinax.pdf
    • http://peibiker.com/uploads/1/3/0/9/130969515/9790362.pdf
    • http://healthatworkpartnership.com/uploads/1/3/0/8/130813447/50fa3d2d.pdf
    • http://dsmithpastels.com/uploads/1/3/0/7/130775634/9970307.pdf
    • http://ninesquareventures.com/uploads/1/3/1/3/131379193/7580397c472e8.pdf
    • http://gatorsdocksidedeland.com/uploads/1/3/1/3/131398225/6887672.pdf
    • http://taxinetworkgeelong.net/uploads/1/3/1/3/131398259/8955668.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00006dca.bin
75eff5bf8699313550ce12998765f545db48cb8892d54b510a878944eeb3617d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6DCA 7992 bytes
font_01_sfnt_off00008cd5.bin
6e68e07cff2d8757d830c9d88859850c7f28a768a7d9714bcb46d94228572eeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD5 3060 bytes

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