Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a4e057e8c194d4…

MALICIOUS

PDF

38.1 KB Created: 2020-03-30 17:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dcbcb4ffc1090ed8d0b97edafd40ee7c SHA-1: f8250bb4f1363d5e0f7e16de5f3578ee12de1d7a SHA-256: a2a4e057e8c194d441a6bbf0293e9cc772241a6ee9995b3231d0b5acf220143e
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though partially corrupted, contains a URL that is also present in the list of extracted URLs. This suggests the primary purpose is to direct users to a network of potentially malicious or SEO-abusing websites.

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://christinafriedle.org/uploads/1/3/0/8/130873869/130873869.html#oracion+al+espiritu+santo+con+letra
    • http://primeagnutrition.com/uploads/1/3/0/3/130323162/4894089ae6.pdf
    • http://tidaleffectscapecod.com/uploads/1/3/1/4/131437352/tusurejonimono_samadofe_matirateke_jusavuz.pdf
    • http://meliorawellness.com/uploads/1/3/0/4/130491322/wabamiw_pirupusugami_saziwifow_fuxirubaj.pdf
    • http://coastaleducationservices.net/uploads/1/3/0/8/130814401/wakizenewuwolulu.pdf
    • http://patriciaeducate.com/uploads/1/3/0/6/130605421/1461573.pdf
    • http://amyerspainting.com/uploads/1/3/1/1/131163932/06fe83d27600.pdf
    • http://australindcoffeeroasting.com/uploads/1/3/0/2/130271009/7898850.pdf
    • http://hccrooted.com/uploads/1/3/0/2/130289789/3285239.pdf
    • http://deinehandwerker.ch/uploads/1/3/0/3/130323510/bozupava-nedejuzamoxenob-gabupurokufe-luxazu.pdf
    • http://udayagaanam.com/uploads/1/3/0/5/130588499/137ebeef.pdf
    • http://photographyinplaya.com/uploads/1/3/0/7/130740572/refununafoje.pdf
    • http://berkshiremazdacredit.com/uploads/1/3/0/9/130969373/5724822.pdf
    • http://campchow.net/uploads/1/3/0/6/130621285/pitavugew.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_off0000694d.bin
9f591fcd97470c2a38e47a934accdad93127bb415622bb0f888a1b35c2f2ad07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694D 8864 bytes

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