Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6262d2cc1059e0…

MALICIOUS

PDF

42.1 KB Created: 2020-03-22 14:53:42 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cfafe87118f399d993611ad4329726d5 SHA-1: 19204156f228176b6dbc6dfa1d0dcc00168bcde4 SHA-256: ed6262d2cc1059e0a708106d111eab99efd770758942fc34fb42b9baf0e86333
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files on different domains. This pattern is indicative of SEO poisoning or a link farm used to distribute malicious content or drive traffic. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://marikacleaningservice.com/uploads/1/3/0/5/130551019/130551019.html#que+es+pulpectomia+dental
    • http://barrelvisions.com/uploads/1/3/0/7/130739632/234717e.pdf
    • http://hmestrategia.com/uploads/1/3/0/6/130604222/16437806ecb312.pdf
    • http://capperlab.com/uploads/1/3/0/8/130813366/kijubof-vamadawatopexo-fajak.pdf
    • http://napacounty-rc.com/uploads/1/3/0/6/130603944/2aeefb9a7.pdf
    • http://thehappiestpuppy.com/uploads/1/3/0/6/130620430/tabizilevidod.pdf
    • http://ptinscottsdale.com/uploads/1/3/0/6/130604549/061bd373edb2cad.pdf
    • http://www.jamesboppsalon.com/uploads/1/3/0/5/130546243/9442917.pdf
    • http://ebbandflood.net/uploads/1/3/0/4/130476423/jufalax.pdf
    • http://theworkshop.audio/uploads/1/3/0/8/130815137/tulowobasowi.pdf
    • http://uptownslice.com/uploads/1/3/0/4/130478551/leruxag.pdf
    • http://www.mailonlineuk.com/uploads/1/3/0/4/130476119/sunapisexotulit.pdf
    • http://northcarolinadefensivedrivingonline.com/uploads/1/3/0/8/130814296/63bdc501.pdf
    • http://ronswalktalks.com/uploads/1/3/0/7/130776676/9945896.pdf
    • http://bramblesandberries.co.uk/uploads/1/3/0/3/130323603/lubesabo.pdf
    • http://www.alaskaforbernie.com/uploads/1/3/0/7/130776541/jiderufolef.pdf
    • http://hostmaster.writingtotheworld.com/uploads/1/3/0/2/130289776/rapigi_wodupajizodosow_niteguwogosokek.pdf
    • http://fethigurcan.org/uploads/1/3/0/6/130621149/d88780041b8.pdf
    • http://letkurock.fi/uploads/1/3/0/5/130539645/78385fef6d5982.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_off00007b76.bin
88875984f6bbe79f927dc09e28c6e0af9d94c2ffb2ed54eb6f92232a22039a48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B76 8240 bytes

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