Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fae4e2393d1d76…

MALICIOUS

PDF

38.9 KB Created: 2020-03-14 21:55:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0d8e7af5f8dccb091c2533e5266b599b SHA-1: dbeba8d8dbb009002e579cec49a735a1aa837b31 SHA-256: 60fae4e2393d1d768916d7842c5c977fb0b545950735062ae7bd2b44fbdad5f9
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to host or link to numerous other PDF documents. No scripts were extracted, but the sheer volume of outbound links points to a malicious intent to direct users to potentially harmful 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://theclassyandjazzyboutique.com/uploads/1/3/0/2/130288397/130288397.html#literal+equations+coloring+activity+football+answers
    • http://mta-sts.sharynjackson.com/uploads/1/3/0/4/130476119/fobamibu.pdf
    • http://thirdgradescholar.com/uploads/1/3/0/6/130604074/2454605.pdf
    • http://fa-vinyl.com/uploads/1/3/0/4/130483487/zopuwizibaxozirizij.pdf
    • http://ns1.happytails.care/uploads/1/3/0/8/130874110/9780285.pdf
    • http://djmir.net/uploads/1/3/0/2/130271124/gopuxunivirirepogok.pdf
    • http://mail2.fowlersmarina.com/uploads/1/3/0/6/130640141/niraver.pdf
    • http://davisok360.com/uploads/1/3/0/3/130324331/9447501.pdf
    • http://www.desertwindmercantile.com/uploads/1/3/0/7/130776218/kedabisutolabasij.pdf
    • http://leejaemyung.org/uploads/1/3/0/8/130873922/jimizisijiri-dafedipetetosak-xugamur.pdf
    • http://www.eatwellnovascotia.com/uploads/1/3/0/6/130621908/31712edbf3a.pdf
    • http://myfuturehorizons.com/uploads/1/3/0/7/130739073/dijonilitudubedusawo.pdf
    • http://encoreomnimedia.com/uploads/1/3/0/6/130603866/1077c2.pdf
    • http://webdisk.vernbalicontractors.com/uploads/1/3/0/5/130551526/b00b7a224bc0b.pdf
    • http://conservedslabs.com/uploads/1/3/0/3/130379222/8419945.pdf
    • http://theinnonsilverlake.com/uploads/1/3/0/7/130738554/15e80b81.pdf
    • http://theduiskeinn.com/uploads/1/3/0/6/130621061/8b040ab37ef.pdf
    • http://ruthcadioli.com.au/uploads/1/3/0/6/130604408/mizaka-vemiwi-ketup.pdf
    • http://rawoyces.com/uploads/1/3/0/8/130874110/7ab9af5ac.pdf
    • http://iinspireme.net/uploads/1/3/0/5/130547884/xodivemetodugalawowu.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_off00006d07.bin
dc48233e166d3b7e20faf3e92b8a276d4db4ec47f84bd29a0704bbb4e122f12f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D07 8524 bytes