Malicious PDF — malware analysis report

Static analysis result for SHA-256 220df0e7877ab742…

MALICIOUS

PDF

30.9 KB Created: 2020-06-07 04:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da4b5b0ede3edf431305927483644ee2 SHA-1: 72133a17f660634bdd7986ad8244ad764c84c7de SHA-256: 220df0e7877ab742dcf924259c2e92c09055f6799b07ab85f8350d4d7ca8f55b
94 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute malicious payloads. The ML classifier strongly indicated maliciousness. The document body contains garbled text and references to 'Dyson dc25 diagram', which appears to be a lure to disguise the true malicious intent. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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://hostmaster.greyeggproductions.com/uploads/1/3/1/4/131414019/131414019.html#dyson+dc25+diagram
    • http://mail.crownhomeinspect.com/uploads/1/3/1/4/131437561/nunamum.pdf
    • http://tjsfitness.org/uploads/1/3/0/5/130551049/biroza.pdf
    • http://linkdnow.com/uploads/1/3/0/3/130313158/gafedapatuzed.pdf
    • http://h2oweddings.com/uploads/1/3/0/7/130739220/gitekoviwojum.pdf
    • http://oc-tutoring.com/uploads/1/3/0/9/130969166/kagilixurilako-xukelufuxaxu.pdf
    • http://nuplumb.com/uploads/1/3/1/3/131379639/jelevubalu.pdf
    • http://cpanel.rmdiai.org/uploads/1/3/0/5/130543054/622f2f28f3c.pdf
    • http://allmanconsultants.com/uploads/1/3/0/5/130543546/4458754.pdf
    • https://zixofiliko
    • https://sololafol.files.wordpress.com/2020/06/ragosedemezunegubowibe.pdf
    • https://voxevodeve.files.wordpress.com/2020/06/78801394224.pdf
    • https://poguwira.files.wordpress.com/2020/06/mewuvixar.pdf
    • https://vigoxijabulo.files.wordpress.com/2020/06/tapujusijugerawi.pdf
    • https://tubanel.files.wordpress.com/2020/06/bugasuset.pdf
    • https://vunawokowe.files.wordpress.com/2020/06/xerugexe.pdf
    • https://kijukadolok.files.wordpress.com/2020/06/damaxajazuvatenitufosu.pdf
    • https://rogosewilut.files.wordpress.com/2020/06/tebami.pdf
    • https://zixofiliko.files.wordpress.com/2020/06/91269956724.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_off000051af.bin
6268686ac5f613715a782b5115a1d16ba5b41aee4db152d2893344edbc4e5135		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51AF 8916 bytes

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