Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4c5304be3775c8…

MALICIOUS

PDF

39.6 KB Created: 2020-04-07 09:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 214f78499f088c3e95b454cd8a2bdc94 SHA-1: 34ac562222b8d7795b9f9b512514da8df3aa673e SHA-256: 7e4c5304be3775c867f8a209acec758ba5b2a5aceac395304a40a7c9bccfb0c9
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body also contains a specific URL, 'http://irieint.com/uploads/1/3/0/5/130546538/130546538.html#latin+quotes+meaning+never+give+up', and numerous other PDF links. This indicates a likely attempt to direct users to malicious or spam content hosted on these external sites.

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://irieint.com/uploads/1/3/0/5/130546538/130546538.html#latin+quotes+meaning+never+give+up
    • http://hittbroadcast.com/uploads/1/3/0/5/130589078/e7658646282.pdf
    • http://eyezbyk.com/uploads/1/3/1/4/131409709/c7269d34d.pdf
    • http://millennialnator.com/uploads/1/3/0/7/130739132/pukiwoliwaxagimiwa.pdf
    • http://pro-properties.net/uploads/1/3/0/8/130815140/49074369c4029b7.pdf
    • http://notyetapparel.com/uploads/1/3/1/3/131380343/9917912.pdf
    • http://woodfirepizzadl.com/uploads/1/3/0/5/130589251/928c7d5d02511f.pdf
    • http://mrspsela.com/uploads/1/3/0/5/130589228/7567464.pdf
    • http://elranchitotaqueriaoh.com/uploads/1/3/0/4/130488662/21d567b826.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_off00007286.bin
3196c16500548cd99db06018933bf3d9cb86ffbc755e28ed03abd4f869d7e18b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7286 8292 bytes

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