Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c2c95ea976163f…

MALICIOUS

PDF

36.0 KB Created: 2020-03-11 15:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9baa5e698da4e9a26e5a72771778168f SHA-1: f6830c212f7a922b08e7e3c483813734e260957d SHA-256: 72c2c95ea976163fbf9cd87a5a30a371778c85730fb3fcf03d84be64a59ec7a0
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or distribution mechanism. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a malicious intent, likely to redirect users to malicious sites or download further payloads.

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://vacationmemories.voyagerwebsites.com/uploads/1/3/0/7/130776801/130776801.html#annual+internal+audit+plan+format
    • http://www.myliaozhai.com/uploads/1/3/0/2/130270966/9117267.pdf
    • http://onepoint-lifebuilding.com/uploads/1/3/0/3/130313673/bdcc889535.pdf
    • http://wendtauto.com/uploads/1/3/0/6/130621044/kilodipabaveki.pdf
    • http://andoverphotobooth.com/uploads/1/3/0/5/130539218/c2dc21a29e4.pdf
    • http://parkshoreplazafolsom.com/uploads/1/3/0/6/130621952/tuzazomuboligo.pdf
    • http://northerndriveschool.com/uploads/1/3/0/7/130739852/ruwezupoke.pdf
    • http://ask-imm.com/uploads/1/3/0/5/130551417/9f7463641dcd.pdf
    • http://mannacrafts.com/uploads/1/3/0/6/130621218/sonovumetegelub_palaruki_supudelaze.pdf
    • http://iceotechhvac.com/uploads/1/3/0/7/130738568/risol_fububi.pdf
    • http://taskblocker.com/uploads/1/3/0/8/130814459/c984a.pdf
    • http://zero3030.com/uploads/1/3/0/3/130313585/piridigobux-xejegeka-remozopasakimax.pdf
    • http://mail.misterspas.com/uploads/1/3/0/5/130589431/xivalupafixika_xudib.pdf
    • http://hostmaster.jodiepatersoncentral.co.uk/uploads/1/3/0/9/130969818/panuvotafos.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_off000065e4.bin
cb90a6b8ce8559e4305f2fd945b8efab31c4ebc7e84d35d208bc4f4d142e0005		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E4 7392 bytes

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