Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b4c6be8e1c9aa7…

MALICIOUS

PDF

38.8 KB Created: 2020-03-10 05:11:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1785c54ee143223ab5e9bd51ac64a6ed SHA-1: 860e336b9c10b50c46a15197f332f60a9b561820 SHA-256: 93b4c6be8e1c9aa70cc06848cd2d0048af25327318591f37ebcaded6e53cd957
94 Risk Score

Malware Insights

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

The PDF contains a large farm of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to numerous PDF files across various domains. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be SEO manipulation or distributing content via these numerous external links.

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://millerhahn-wedding.rominastiebenphotography.com/uploads/1/3/0/4/130476158/130476158.html#p90x+ab+ripper+x2+video
    • http://www.iezrareresources.com/uploads/1/3/0/8/130873971/nenepunanefujupo.pdf
    • http://tyanidesigns.com/uploads/1/3/0/5/130550736/9e9e3.pdf
    • http://www.68flooringoutlet.com/uploads/1/3/0/5/130551302/8866857.pdf
    • http://tanjazumanschauen.com/uploads/1/3/0/2/130271243/vomagadimarubid-nipurek-sudasagib-zogelosudov.pdf
    • http://rlwhitephoto.com/uploads/1/3/0/6/130604114/1645b0383db.pdf
    • http://fastmoneymovie.com/uploads/1/3/0/5/130551607/1323183.pdf
    • http://beachfrontcondosfl.com/uploads/1/3/0/7/130775742/galuvufulifa-tavasokovo-vutafataveped.pdf
    • http://autodiscover.atriumcorporatepark.com/uploads/1/3/0/5/130543010/xobedawudokuz_wanozeb.pdf
    • http://mieswholesalemeats.com/uploads/1/3/0/2/130270775/fipetovolinike.pdf
    • http://www.konishi-kg.org/uploads/1/3/0/7/130776233/4859254.pdf
    • http://erinemalone.com/uploads/1/3/0/4/130483811/143a4d1.pdf
    • http://hostmaster.havering-atte-bower-cc.co.uk/uploads/1/3/0/2/130289291/zasapokilunub-vidozubuwe-xexuzek.pdf
    • http://morellicup.com/uploads/1/3/0/6/130620921/jalijelifebotexow.pdf
    • http://mx.flyfishingcoyhaique.com/uploads/1/3/0/6/130639781/vejamel-jegizunixes.pdf
    • http://mail.mx.peteandlauren.com/uploads/1/3/0/4/130489131/segezaguworugemasu.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_off0000708d.bin
c24b27bc5c3a757d8e2d8bbef67b11260a55eb3d339ca31cc490314924af461c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708D 7664 bytes

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