Malicious PDF — malware analysis report

Static analysis result for SHA-256 9893476146de561c…

MALICIOUS

PDF

34.5 KB Created: 2020-05-25 18:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f45798f198bf7f60196ea0c3447831cb SHA-1: 1cd0fe9897b5a547ccff7766a65f6e74b1a9ef74 SHA-256: 9893476146de561c0ce8f64e40240dfca56a68b817669f1455ea008c887a1495
94 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to a network of websites, likely for SEO spam or to host further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://career-competency.com/uploads/1/3/0/6/130621606/130621606.html#son+of+neptune+pdf
    • http://livingdelicious.com/uploads/1/3/1/3/131379231/9107223.pdf
    • http://ftconstructionservices.com/uploads/1/3/0/7/130739023/2681834.pdf
    • http://maltesesunshine.net/uploads/1/3/0/5/130539295/90108ea86.pdf
    • http://rosieriggir.com/uploads/1/3/1/4/131438891/lojipisak.pdf
    • http://arleneestevez.com/uploads/1/3/1/8/131871912/gitunugoz.pdf
    • http://2614ogleton.com/uploads/1/3/0/5/130588494/858714.pdf
    • http://catalyzingcommunity.com/uploads/1/3/0/2/130289485/sirupapinuxuje.pdf
    • http://610westash.com/uploads/1/3/0/3/130323998/gakigobuxu_zivunezejaxo.pdf
    • http://mznessa.com/uploads/1/3/1/4/131455832/tefujasekekuril_rowebunegipam_perevamenaki.pdf
    • http://vitalbloomwellness.com/uploads/1/3/1/4/131452876/xefelu_jawezado_miporupig.pdf
    • http://santosmontajesyreformas.es/uploads/1/3/0/7/130739419/kitetub.pdf
    • http://bushelandbasket.com/uploads/1/3/1/4/131455825/dafonibaredetamaba.pdf
    • http://hsglobalservice.com/uploads/1/3/1/3/131381886/a4dca1.pdf
    • http://clarksvillehomeinspectionpros.com/uploads/1/3/0/9/130969639/649d9cab651.pdf
    • http://baselubricantes.com/uploads/1/3/0/8/130874059/dapikokusimu.pdf
    • http://plane-workshops.com/uploads/1/3/1/4/131452814/nidogeza.pdf
    • http://wecomeinpieces.com/uploads/1/3/0/7/130738850/bumezobuniro.pdf
    • http://bestactivespeakers.com/uploads/1/3/0/3/130313741/penawet.pdf
    • http://mail.lastwindup.com/uploads/1/3/0/6/130639093/vifubegunizora.pdf
    • http://thomersontranscription.com/uploads/1/3/0/8/130874090/b28087c10fde.pdf
    • http://zambettimd.net/uploads/1/3/1/3/131398274/96d7497.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_off00005cbd.bin
3b99768894cf04f502ce2fd48a846151ccf68780e6532ea3814f6cf4c15becd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBD 9924 bytes

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