Malicious PDF — malware analysis report

Static analysis result for SHA-256 b015c3ea192b805d…

MALICIOUS

PDF

38.2 KB Created: 2020-03-22 13:06:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a6a12b0f1acc1afab28f48388fd4c4d5 SHA-1: 00b8f83cb6f8fb06cf57c1a9fbcc2e6a978b2a14 SHA-256: b015c3ea192b805d0852a11bdc7f8b2f1404ccf6489762f2517513fb3ea1aef7
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The primary intent appears to be directing users to a network of potentially malicious or spam-related content through these numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://gasandgrill.com/uploads/1/3/0/6/130639747/130639747.html#nucleo+sujeto+y+predicado+ejercicios
    • http://elkgrovepetclinic.preview.pethealthnetworkpro.com/uploads/1/3/0/7/130776408/6eb19a8d7a6f.pdf
    • http://heartstrings.shop/uploads/1/3/0/8/130815192/6393304.pdf
    • http://435676578364674396.com/uploads/1/3/0/2/130272557/0d5bd.pdf
    • http://natgastrucks.com/uploads/1/3/0/4/130435536/c5e2b8a8282216.pdf
    • http://a1hourservice.com/uploads/1/3/0/3/130313053/8332672.pdf
    • http://wnctreeculture.com/uploads/1/3/0/7/130776786/lawajufujipago-fufugo-matoda-gaxojekep.pdf
    • http://peterstownshipgolf.org/uploads/1/3/0/7/130775476/207eedeeaea05b7.pdf
    • http://simpitvisuals.com/uploads/1/3/0/4/130476866/a9b55dd.pdf
    • http://floralstems.com/uploads/1/3/0/2/130288439/8abaef3520684.pdf
    • http://texastanmakers.com/uploads/1/3/0/7/130738771/datus.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_off00006b65.bin
99c4063f297547df37b343b2bc119c75541f86329dd7203232ed2ec87a8cc578		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B65 8540 bytes

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