Malicious PDF — malware analysis report

Static analysis result for SHA-256 607917bf311d33ec…

MALICIOUS

PDF

46.0 KB Created: 2020-03-20 09:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 31da9e462d75913b054de9c28488f9c1 SHA-1: 04dca8a5dce285a52eb97e5e57ac6fddb33a1fd3 SHA-256: 607917bf311d33ecdbfb2725c1df1c6646d4dd40e91283de07b9682816c01104
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified as a PDF_SEO_LINK_FARM heuristic. The primary URL points to a page discussing fossil fuels, but the majority of the links are to other PDFs hosted on similar domains, suggesting a link farm or redirection scheme. No scripts were extracted, but the presence of numerous external links indicates an attempt to direct users to potentially malicious or deceptive content.

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://pack289.org/uploads/1/3/0/6/130604720/130604720.html#porque+se+agotan+los+combustibles+fosiles
    • http://lizamaroni.com/uploads/1/3/0/6/130621751/juwiduxegurob-bivunefi-nafegavuragiver.pdf
    • http://entledracula.com/uploads/1/3/0/6/130605118/juditewegogopa_marobuzapero.pdf
    • http://anandalaketahoe.com/uploads/1/3/0/4/130476516/2501335.pdf
    • http://thuvaiyal.com/uploads/1/3/0/3/130313107/vamiga_wibegaxe.pdf
    • http://www.letsbowtique.com/uploads/1/3/0/6/130604423/2091578.pdf
    • http://www.austinpainters.info/uploads/1/3/0/8/130814127/mesegawo_bimiferatuxo_duxopuxigude_sirolebanirub.pdf
    • http://www.autoreza.com/uploads/1/3/0/2/130272384/7568405.pdf
    • http://bakerlawga.com/uploads/1/3/0/4/130476120/eae84704dbb5684.pdf
    • http://imactsym.com/uploads/1/3/0/7/130739324/c484a0d21b.pdf
    • http://www.myfallingleaves.com/uploads/1/3/0/5/130544243/80907e10.pdf
    • http://advantagedroneproductions.com/uploads/1/3/0/6/130620356/8d63c.pdf
    • http://tccellars.com/uploads/1/3/0/9/130969370/ziboritenajemi-mepimibu-zapugarisatunu.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_off000087ed.bin
34f9dea667df29554b9f1325d33f02d0f3b3339544ece8d114336e5e004935ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87ED 9412 bytes

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