Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed9708c6b08a1a6…

MALICIOUS

PDF

37.6 KB Created: 2020-03-16 16:00:16 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f28116a1c0d7871a3f809a367d700cf5 SHA-1: d4006b390cf1a4aca37a5029c2bc5dd024830e34 SHA-256: 8ed9708c6b08a1a64179d41e6261ae924eba81b1a34106814010b90a1e16b958
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links points to a likely attempt to manipulate search engine results or redirect users to phishing or malware hosting sites.

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://mingzhuyulechengxianjinbaijiale.br3h.com/uploads/1/3/0/5/130539875/130539875.html#estructura+de+lewis+del+h2o
    • http://host90.carmichaelnl.com/uploads/1/3/0/6/130639632/6428223.pdf
    • http://studiobapparel.com/uploads/1/3/0/7/130739656/dukozegawajomavadovo.pdf
    • http://nolatamales.net/uploads/1/3/0/7/130776451/6320229.pdf
    • http://develleoper.com/uploads/1/3/0/2/130272925/57787d4.pdf
    • http://www.theomegacompany.org/uploads/1/3/0/2/130289595/7205827.pdf
    • http://www.loveprettything.com/uploads/1/3/0/7/130739405/numowudujivegu.pdf
    • http://spanoconstruction.org/uploads/1/3/0/5/130551302/sepasililib.pdf
    • http://keystages.shenfieldlearning.com/uploads/1/3/0/6/130639634/gajapanisulu.pdf
    • http://www.inthedarkthefilm.com/uploads/1/3/0/6/130620828/ed0b9e7a5d.pdf
    • http://capitaosp.com/uploads/1/3/0/6/130639599/jobigegoweg_dimeru.pdf
    • http://starthereforwellness.com/uploads/1/3/0/7/130775813/mapajajijifokijora.pdf
    • http://aviatorradio.org/uploads/1/3/0/6/130640033/setutuk.pdf
    • http://mybeautyinkstudio.com/uploads/1/3/0/3/130379365/630160fb6c43.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_off000067be.bin
1f460192890041179d207200c356da7a913731625203f34978a77c074d92c5a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BE 8772 bytes

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