Malicious PDF — malware analysis report

Static analysis result for SHA-256 17769172355c4339…

MALICIOUS

PDF

50.1 KB Created: 2020-03-31 04:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 885ec4fa8c16b5f39a3711f5af8e21c8 SHA-1: 79d0be164ba571889a3a8017b8ac9eec4d7936cb SHA-256: 17769172355c4339007c786f8a656b1080a5799f3755438c9347adf56b1d77ea
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, which is a common technique for SEO manipulation or distributing malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports this assessment. While no scripts were directly extracted, the structure and heuristics suggest the document's primary purpose is to redirect users to potentially harmful external 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://frackingprosandcons.info/uploads/1/3/0/7/130775339/130775339.html#medios+preparatorios+a+juicio+mercantil+machote
    • http://net-formance.fr/uploads/1/3/0/5/130588508/vajexos.pdf
    • http://designingyourlifeworkshop.com/uploads/1/3/1/0/131069875/1781338.pdf
    • http://rehla.org/uploads/1/3/0/5/130589400/398885.pdf
    • http://keeley-smith.com/uploads/1/3/0/6/130620480/tidubowetufobekezir.pdf
    • http://theresastewarthupp.com/uploads/1/3/0/5/130546923/famojamoxabi-bukaruwud-surozorenorigob.pdf
    • http://bankersally.com/uploads/1/3/1/4/131437074/992581.pdf
    • http://basestrengthconditioning.com/uploads/1/3/0/7/130739864/8184950.pdf
    • http://fauxtalesgnv.org/uploads/1/3/0/5/130588874/eb00865367a.pdf
    • http://lgbaonline.org/uploads/1/3/0/3/130313358/mupur_pedit_naxularekuk.pdf
    • http://aefamilyfarms.com/uploads/1/3/0/8/130814017/62251b37e406d3d.pdf
    • http://hnpadventures.net/uploads/1/3/0/6/130604821/7053957.pdf
    • http://donnacloudsalon.com/uploads/1/3/1/3/131379274/2516490.pdf
    • http://cstrucking.org/uploads/1/3/1/3/131398097/kofolafutoxos.pdf
    • http://myparentingclass.org/uploads/1/3/0/5/130551235/aeda0f40c1.pdf
    • http://sherryprint.com/uploads/1/3/0/7/130776314/safavon.pdf
    • http://matsuitc.com/uploads/1/3/0/4/130435753/sodiragomibosi.pdf
    • http://koches.design/uploads/1/3/0/2/130292007/b54be50.pdf
    • http://carrollfarmtotable.com/uploads/1/3/0/4/130483110/5126350.pdf
    • http://mmdrentals.com/uploads/1/3/0/7/130739509/nusin.pdf
    • http://qbhomesptyltd.com/uploads/1/3/0/2/130289532/darudebiboge_vaxuxodi.pdf
    • http://wellnessfan.com/uploads/1/3/0/3/130313358/baxiwimil_kexotidigalo_nozojuwo.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_off00009711.bin
4c1b5f2d39e1c1d22119e71b1b6a5540c22e02ca17e7dbdb70d10f53fb175679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9711 10076 bytes

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