Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e570e5fb00f7458…

MALICIOUS

PDF

42.5 KB Created: 2020-04-01 20:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1892ad91dbfd6d584fa1a2a314547a76 SHA-1: 211c55cc4939c7dfd2fa3f8648da41d4c06abb7e SHA-256: 2e570e5fb00f7458d2b18b11a86e9a7bd583a81c4ea8b010a70b2ddec557899f
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, and the document body contained mostly obfuscated or irrelevant text.

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://xciteeducation.com/uploads/1/3/0/5/130588573/130588573.html#fretless+finger+guide+cello
    • http://cheap-pr.com/uploads/1/3/0/2/130287973/merutudada_jadinexa.pdf
    • http://tamzinmuir.com/uploads/1/3/0/3/130313026/talezibudaxebanon.pdf
    • http://crystalcatdesigns.com/uploads/1/3/0/2/130289313/34901b417d507d.pdf
    • http://maxlifebenefits.com/uploads/1/3/0/5/130543346/refedobokaliram.pdf
    • http://marcellbeauty.com/uploads/1/3/0/6/130620468/15d0648e006e.pdf
    • http://energieambassadeurstop.nl/uploads/1/3/0/3/130324137/konupa-gikorakawikobib-ravepalog.pdf
    • http://epimakeupartist.com/uploads/1/3/0/5/130588798/eb66b09fd2c8a.pdf
    • http://sampriven.com/uploads/1/3/0/5/130589409/8965f96267.pdf
    • http://ausomesaucepuzzles.org/uploads/1/3/0/4/130476744/kufotivefina.pdf
    • http://www.plewisheatingandplumbing.co.uk/uploads/1/3/0/5/130551176/1420632.pdf
    • http://videogamesandmachineguns.net/uploads/1/3/0/8/130813965/zibin.pdf
    • http://loadingescaperoom.com/uploads/1/3/1/3/131383949/zutudabawamewemijew.pdf
    • http://31happiness.com/uploads/1/3/1/0/131070148/f3460160760d.pdf
    • http://routardvirtuel.com/uploads/1/3/0/6/130621178/9758370.pdf
    • http://villageconsulting.org/uploads/1/3/1/0/131070872/pekinomutagi_nodatugeruso_fugotori_bejabato.pdf
    • http://katakekedi.com/uploads/1/3/0/6/130604748/gafenujerinula-pezufazi-tawav-zegumobaditu.pdf
    • http://thethoughtfulhusband.club/uploads/1/3/0/7/130775644/liniwen.pdf
    • http://ldsstorytime.com/uploads/1/3/1/3/131383332/09d0f85171.pdf
    • http://ronasdistractedfitness.com/uploads/1/3/0/8/130874639/tubiru_junaxexazide_maworito_melef.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_off00007be3.bin
22438635907df8c575cff417f0cb9653bf36f1ef1e643818f35bcc2816b4ddd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE3 8564 bytes

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