Malicious PDF — malware analysis report

Static analysis result for SHA-256 e289c37009d5d3d7…

MALICIOUS

PDF

74.6 KB Created: 2021-02-27 19:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d1b5088a2a205396e401b32cef9b594 SHA-1: 4b8298cf590b512d99b7834a7590d2a6e17f033e SHA-256: e289c37009d5d3d7fb4d46f9b4d878c7416eab3325984c078a627788f65f5096
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spamming operation. One of the embedded URIs, 'https://lozipotod.ru/123?utm_term=yoga+book+c930+price+in+malaysia', appears to be a lure for users searching for product information, likely redirecting to a malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 https://lozipotod.ru/123?utm_term=yoga+book+c930+price+in+malaysia
    • https://bumogekatagod.weebly.com/uploads/1/3/0/7/130776321/4716fd4a.pdf
    • https://xenesadu.weebly.com/uploads/1/3/0/7/130739949/wibirusuxosej.pdf
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/5587144.pdf
    • https://piturerakilapes.weebly.com/uploads/1/3/0/7/130775197/xovosazudejimi.pdf
    • https://cdn.sqhk.co/kinubowa/iQvhcih/51487587716.pdf
    • https://zosixilerav.weebly.com/uploads/1/3/1/8/131856356/480256.pdf
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/9154506.pdf
    • https://cdn.sqhk.co/kitujesijak/4hhhngg/sport_racing_apk_data_mod.pdf
    • http://vowufijetapiko.sportsontheweb.net/fixabumene.pdf
    • https://sarejazaxixosib.weebly.com/uploads/1/3/4/6/134633098/9f72f00a443a.pdf
    • https://static.s123-cdn-static.com/uploads/4488817/normal_5fcb4bb46bb44.pdf
    • https://cdn-cms.f-static.net/uploads/4377931/normal_6020bc05df1ca.pdf
    • https://jebapawobukil.weebly.com/uploads/1/3/4/5/134521284/tinuwori-kuzebarajek-jumavu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d76d.bin
3334808a5a4cadc65e0d3e5ddf4d134252c3c6300c4e8b0731e3a50e01fff77f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD76D 5984 bytes
font_01_sfnt_off0000ebc3.bin
448115929d2cd1f2bd69c90a516d792452f2974999ecf1ec362665de497c51b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 15076 bytes

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