Malicious PDF — malware analysis report

Static analysis result for SHA-256 59abc2377e84af84…

MALICIOUS

PDF

28.5 KB Created: 2020-05-05 23:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e3cd1a4c776a93f8b9db9ab54f362b94 SHA-1: 3f9076797c934863ebe867b83e04202387c7f9d0 SHA-256: 59abc2377e84af846aff890fb364ea4b9c20c227cda08a0bad11212ba66878bd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for malicious content. The ML classifier strongly flagged this PDF as malicious. The presence of numerous external links suggests an attempt to manipulate search engine results or to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://machoco.com/uploads/1/3/1/6/131606619/131606619.html#namita+agrawal+bhajan+gita
    • http://panelinha.net/uploads/1/3/0/5/130588842/pevesu.pdf
    • http://theboxcar.ca/uploads/1/3/1/0/131070539/simop_fedarukalosilav.pdf
    • http://merchsyte.com/uploads/1/3/0/6/130639439/c3012b847d01.pdf
    • http://jeffersonelementarypta.org/uploads/1/3/0/5/130551343/lexadisatipepu.pdf
    • http://model-dream.com/uploads/1/3/1/0/131070195/4d0d76d3bc.pdf
    • http://angelabvilla.com/uploads/1/3/0/4/130488316/6ef76a07f53.pdf
    • http://americanoffroadnv.com/uploads/1/3/0/6/130640070/kujadapazoj.pdf
    • http://swinganoia.com/uploads/1/3/0/5/130550871/4250359.pdf
    • http://edenbrandknits.com/uploads/1/3/0/9/130969727/2139433.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off00004695.bin
d7cf0b4d7459d573495504031398ffdc4a6e573db8784eed5e6f5c6ce08eb484		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4695 9484 bytes

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