Malicious PDF — malware analysis report

Static analysis result for SHA-256 879a80bca7e0646d…

MALICIOUS

PDF

41.4 KB Created: 2020-06-02 07:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f903d94382c4139de0be55981573fcea SHA-1: 4f3943c3cec2ed667fcca25275eccb9939d33335 SHA-256: 879a80bca7e0646d8210bcb55ba21b48c5da256fbb23874ee92d00c5eabe71ee
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body contains text that appears to be metadata and a URL, suggesting a lure to download further content. The primary attack pattern involves directing users to a network of linked websites, likely for malicious purposes such as SEO poisoning or malware distribution.

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://thehumanresiliencyproject.org/uploads/1/3/1/8/131871644/131871644.html#banda+ms+mi+razon+de+ser+descargar+m
    • http://ofertasmedellin.com/uploads/1/3/0/2/130273850/7b41f0a35.pdf
    • http://simply-crafty.com/uploads/1/3/0/6/130620962/0a772d.pdf
    • http://hostmaster.shiatsu.gent/uploads/1/3/0/6/130604903/xanokawif.pdf
    • http://jr-group.org/uploads/1/3/0/3/130379391/1051970.pdf
    • http://ready2sign.org/uploads/1/3/1/3/131379899/tejope_lulomubasogugox.pdf
    • http://detourfromtheeveryday.com/uploads/1/3/0/5/130589305/dolibopajanipol.pdf
    • http://bluelionelectronics.com/uploads/1/3/0/7/130739116/5a6c553cf.pdf
    • http://thehumanresiliencyproject.org/uploads/1/3/1/8/131871644/terms.html
    • http://thehumanresiliencyproject.org/uploads/1/3/1/8/131871644/dmca.html
    • http://thehumanresiliencyproject.org/uploads/1/3/1/8/131871644/policy.html
    • https://gefadosujugi.files.wordpress.com/2020/05/20652517390.pdf
    • https://boxavamox.files.wordpress.com/2020/05/dinemunumojunavilese.pdf
    • https://guzamid.files.wordpress.com/2020/05/10239342520.pdf
    • https://mopetane.files.wordpress.com/2020/06/7505713773.pdf
    • https://kawumafovod.files.wordpress.com/2020/06/zogasevufivejo.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_off00006e66.bin
121f2d896c2cec6f8e1518c2a61b8e03d3b3218811c12ea37ebb7b1792bdb188		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E66 13156 bytes

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