Malicious PDF — malware analysis report

Static analysis result for SHA-256 0609f6f2984d7b49…

MALICIOUS

PDF

32.5 KB Created: 2020-05-16 04:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 206f362c958a7e871fa8954312e5f89d SHA-1: cee793e3605ccc0d758800e5320c8f53db78d0ac SHA-256: 0609f6f2984d7b49f0d54ae22cec4458454019ce573a697591eaaad5d283e7ec
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or a method to distribute malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of numerous URLs points towards a potential distribution or redirection mechanism, possibly leveraging embedded JavaScript within the PDF structure.

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 http://atlanticpaint.com/uploads/1/3/0/7/130738591/130738591.html#android+developer+training+by+google
    • http://theaustraliancraftdrinkscompany.net/uploads/1/3/0/5/130588318/sobomipapopamux.pdf
    • http://iglootw.com/uploads/1/3/0/5/130588757/48953633.pdf
    • http://rightcaronline.com/uploads/1/3/1/3/131380803/571325.pdf
    • http://supernalrealm.com/uploads/1/3/0/6/130620874/6497933.pdf
    • http://dimcreations.com/uploads/1/3/0/6/130639949/naxom.pdf
    • http://amnonharel.info/uploads/1/3/0/7/130739560/nawalid-figiv-tifapitodejaxa.pdf
    • http://mintofarm.ca/uploads/1/3/0/5/130588675/fizegonapuk.pdf
    • http://limoenseservice.com/uploads/1/3/0/6/130621657/9460631.pdf
    • http://salemnhvillas.com/uploads/1/3/0/2/130272070/sowamowexamifirujov.pdf
    • http://changewiththeta.com/uploads/1/3/1/4/131437352/6a162a0a1022d.pdf
    • http://enseadaportugal.com/uploads/1/3/0/2/130288542/baparufuvexusatawuf.pdf
    • http://kevinaxx.com/uploads/1/3/0/6/130620689/jirusor.pdf
    • http://vofashion.org/uploads/1/3/0/2/130273753/5868620.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000552b.bin
3c086e55cd0efdb5cec1f480af41d17f00e6af350879c30a5864b95a7d5d87b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x552B 9880 bytes

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