Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a54a9af5227d00…

MALICIOUS

PDF

35.5 KB Created: 2020-06-14 10:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20dfecabff556d2d6df4de7481743986 SHA-1: 7bfcef79f9ba79ba997274a8b1bd8050c42826ea SHA-256: e3a54a9af5227d00dc2a7adc616919bd30f73c8ef3437c7e2cd72f6b0a307f1f
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains structured for SEO spam. The document body references a popular TV show, likely as a lure to attract clicks to these external URLs. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm designed to drive traffic to external sites, which could host further malicious 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://vivalavida.dance/uploads/1/3/0/8/130874109/130874109.html#spartacus+1.+sezon+1.+b%25C3%25B6l%25C3%25BCm+t%25C3%25BCrk%25C3%25A7e+dublaj
    • http://renehewittseasonings.com/uploads/1/3/0/3/130313605/vuzijufet-nefetipeda-nenaxu-sipiba.pdf
    • http://6bkmc.bpmtc.com/uploads/1/3/1/8/131871835/wiwaw.pdf
    • http://clscleaning.com.au/uploads/1/3/1/4/131452735/7984753.pdf
    • http://drpeppertouchdown.com/uploads/1/3/0/8/130814060/vodanotepulusi.pdf
    • http://eneduerabe.org/uploads/1/3/0/3/130379676/wijarofipeboz-nilujexegarevul.pdf
    • http://crownandfeather.co.uk/uploads/1/3/0/5/130540155/f94034efde6f7.pdf
    • http://seamevents.net/uploads/1/3/1/6/131637763/4465225.pdf
    • https://rulolinenu.files.wordpress.com/2020/06/wadafevevajerazem.pdf
    • https://vikezepe379027054.files.wordpress.com/2020/06/62333766686.pdf
    • https://kozujatuvi.files.wordpress.com/2020/06/30158642753.pdf
    • https://vivaguki.files.wordpress.com/2020/06/mabawogojasagesapimom.pdf
    • https://fonosusuba.files.wordpress.com/2020/06/tovun.pdf
    • https://polagigeso.files.wordpress.com/2020/06/sesiranaxabanexabika.pdf
    • https://wajowobosub.files.wordpress.com/2020/06/setaxetatamizurujonewolu.pdf
    • https://gikakuwadin.files.wordpress.com/2020/06/86597120910.pdf
    • https://xovezuxa802976098.files.wordpress.com/2020/06/83896720365.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_off00005aa7.bin
cbf7cda6682b63c55820493102a7b4242ef563e9aad3d392a161016fcd736dbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA7 11600 bytes

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