Malicious PDF — malware analysis report

Static analysis result for SHA-256 928547685d0a0922…

MALICIOUS

PDF

58.8 KB Created: 2020-03-26 15:00:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ebfc78f4aa77a7c3627fe74e9346b8fd SHA-1: ae77f6e1808c06adf82cb8fb5a218a603dbec88c SHA-256: 928547685d0a0922977fd66e26f2fec7ae9b1a12c24e02514d163947a1b1bde6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

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 strongly indicated maliciousness. The document body contains text related to 'The Stand Stephen King movie songs' and wkhtmltopdf metadata, but the primary malicious activity appears to be the extensive linking.

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://hazmatpackingandsupplies.com/uploads/1/3/0/7/130739910/130739910.html#the+stand+stephen+king+movie+songs
    • http://agangofgirls.com/uploads/1/3/1/1/131164428/763a36518a3.pdf
    • http://alraiq.net/uploads/1/3/0/6/130639764/bonazobemapazinerumu.pdf
    • http://glassworks.nz/uploads/1/3/0/5/130551718/1960926.pdf
    • http://www.eriedistilling.com/uploads/1/3/0/4/130435956/53bf2f8eec4580.pdf
    • http://matthewjacobi.com/uploads/1/3/1/1/131164474/1728459.pdf
    • http://charlesfoto.net/uploads/1/3/0/7/130739369/4952691.pdf
    • http://www.emberlyjames.com/uploads/1/3/0/7/130738555/2991430.pdf
    • http://www.equi-entries.com/uploads/1/3/0/3/130380002/zenesizubumoke.pdf
    • http://cpanel.jongagnoncomedy.com/uploads/1/3/0/2/130288762/fodajimemofux.pdf
    • http://whirledtees.com/uploads/1/3/0/6/130639755/251490.pdf
    • http://edlogics.org/uploads/1/3/0/9/130969759/9983986.pdf
    • http://detoxsearch.com/uploads/1/3/0/3/130312971/7470918.pdf
    • http://callielong.com/uploads/1/3/0/9/130969329/raloxesaxosoxazave.pdf
    • http://www.droneup.xyz/uploads/1/3/0/2/130271121/xodatewaguma.pdf
    • http://cornerstorecreations.com/uploads/1/3/0/6/130620275/7902795.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_off0000ba18.bin
d1e21fb8a2885d2a091b3e45b0c49d8fc6fadaaa35a78aef9a15425fbdd7c7fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA18 8920 bytes

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