Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e1eec08651c534…

MALICIOUS

PDF

45.7 KB Created: 2020-03-22 10:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f37fa05f8f87bc26d99f8cc15f44f9ea SHA-1: 1198414484032910bb17a75ed3d7babde69b3dd6 SHA-256: 70e1eec08651c5345741829a4fc7bf97f41114c2c96220d6b14f9de3a30cac83
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains, suggesting a coordinated effort to manipulate search engine results or to host malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the interpretation that these links are part of a malicious scheme rather than legitimate 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://tropicalsurftours.com/uploads/1/3/0/4/130492963/130492963.html#the+lion+king+characters+wikia
    • http://whipfirefitness.com/uploads/1/3/0/6/130604215/gunopariz.pdf
    • http://myveganstation.com/uploads/1/3/0/5/130551341/minexokaxaxow_pakiwafipogepu_woxurobopi.pdf
    • http://suecarnegieharding.com/uploads/1/3/0/2/130289319/31cf503f883.pdf
    • http://mta-sts.mail.hampshiremanagement.net/uploads/1/3/0/7/130739764/8127a4f09d.pdf
    • http://beautybynicole.co/uploads/1/3/0/8/130815095/padij-takewebabidire.pdf
    • http://njmdedresses.com/uploads/1/3/0/4/130483299/fiwuf-puboj-tadefuzi-saretitagosux.pdf
    • http://erbertelectricllc.com/uploads/1/3/0/6/130604117/9b852d.pdf
    • http://teglearninganddevelopment.com/uploads/1/3/0/4/130490875/jibosowed.pdf
    • http://aikenkraft.com/uploads/1/3/0/7/130775672/959ea6f024d0196.pdf
    • http://threadlinebranding.com/uploads/1/3/0/5/130588407/193472.pdf
    • http://www.jusdrivingschool.com.au/uploads/1/3/0/3/130313167/dewebe_xikij_sokelatufof.pdf
    • http://mrspsela.com/uploads/1/3/0/6/130604338/gaxodibaludisiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008177.bin
5dc1828790cb1e709bf800ce336bf85af4840a2e4094ce6700c375acb0fc26fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8177 7984 bytes
font_01_sfnt_off0000a055.bin
87fd6b1a35a64f5c2d30902eea89631a9c05d6b36ef70c6d0cee4d2ad867525e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA055 2596 bytes

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