Malicious PDF — malware analysis report

Static analysis result for SHA-256 2911374706bba0ae…

MALICIOUS

PDF

41.0 KB Created: 2020-03-26 12:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0ddaca7e61edde388205b73480739a66 SHA-1: 32e454a97cc98f3947a88dee8cefae4ffc5e2301 SHA-256: 2911374706bba0ae170f997b1284bb768c164f061e1321338f2969b2eb396d34
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains garbled text but also includes URLs that are part of the link farm. The primary attack pattern appears to be SEO manipulation or redirecting users to potentially malicious content hosted on numerous domains.

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://mikeintucson.com/uploads/1/3/0/7/130776514/130776514.html#sinonimos+de+prudencia+madurez
    • http://idealfermeture.com/uploads/1/3/0/7/130738850/pominopetanidefija.pdf
    • http://www.kfsupportservices.com.au/uploads/1/3/0/5/130544635/5b2fce0f69.pdf
    • http://medezen.net/uploads/1/3/0/4/130483393/8742401.pdf
    • http://woodlandswomensexpo.com/uploads/1/3/0/3/130313049/4fb9ccb54.pdf
    • http://yearsofadventures.com/uploads/1/3/0/4/130475996/dotavepejewururawuv.pdf
    • http://alebalieiro.cl/uploads/1/3/0/6/130639635/welunijorurapa_xegafubuxox_goxebiw.pdf
    • http://joyceandcraig.com/uploads/1/3/0/3/130323632/muvun.pdf
    • http://ssl-general.sslcommunity.com/uploads/1/3/0/7/130739333/8743947.pdf
    • http://coacosmetics.com/uploads/1/3/0/4/130483345/jixesufupi.pdf
    • http://nedcosummerblitz.com/uploads/1/3/0/5/130551417/pokuxafuxomerus.pdf
    • http://plussizeweddingdressesinnh.com/uploads/1/3/1/0/131071277/322969.pdf
    • http://ideeenwijzer.com/uploads/1/3/0/3/130323624/c9c7e25f6.pdf
    • http://www.goldentrianglerc.org/uploads/1/3/0/8/130814179/zujaretaxenej-weperisuzi-gabojag-soxepudujumove.pdf
    • http://smpcreditrepair.org/uploads/1/3/0/5/130588681/a7b617395e2b1a1.pdf
    • http://girlcodeinc.com/uploads/1/3/0/3/130313218/jijikazirudiki.pdf
    • http://edushareasia.com/uploads/1/3/0/2/130289692/kojevilowomatoj.pdf
    • http://donthesitate.org/uploads/1/3/0/4/130476244/zuluf_dokube_tawelemigu.pdf
    • http://movingcompanyokc.com/uploads/1/3/0/2/130291809/5c1f7.pdf
    • http://autorijschoolschiedam.com/uploads/1/3/1/1/131163931/6974084.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_off00007510.bin
a9965222b41ea3145555471cf2d388b2d192252f70c45408d0426df3209f440f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7510 8696 bytes

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