Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4b6be3bbb384926…

MALICIOUS

PDF

31.2 KB Created: 2020-05-15 10:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b45236d8c6ece929a35d792eb02dcb22 SHA-1: e20ca11f966ed607c264927c3601d8827c762c3d SHA-256: a4b6be3bbb384926a8286bdd10c7dc974e6222baf176d1cbfc676d786764e3c1
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF documents hosted on various domains. This behavior is indicative of an SEO poisoning or link farm attack, designed to drive traffic to potentially malicious content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://wehappyhair.com/uploads/1/3/0/7/130739251/130739251.html#jingle+bells+violin+sheet+music
    • http://handmadeinct.com/uploads/1/3/1/3/131398076/7014408.pdf
    • http://ipsyhealth.com/uploads/1/3/0/7/130739535/0d3fcc03fab9.pdf
    • http://triple-aim-consulting.com/uploads/1/3/0/6/130604067/sagilebezudug_manixen.pdf
    • http://palety-krakow.pl/uploads/1/3/0/7/130776750/pududolak_setowinegosomi.pdf
    • http://kylandarnell.com/uploads/1/3/0/8/130814393/buref_kodalivibeduw_lojajuditom_wumotiferukoza.pdf
    • http://musiccityconnect.org/uploads/1/3/0/6/130639662/7867287.pdf
    • http://my-healthy-life-cbd.com/uploads/1/3/1/4/131438729/3ddacd.pdf
    • http://fourseasonservices.com/uploads/1/3/0/5/130589423/fa2cb.pdf
    • http://sedanthegodofsound.com/uploads/1/3/0/5/130590714/moxaviv.pdf
    • http://digitaldocmd.com/uploads/1/3/0/5/130551704/gokobanixomufugasuku.pdf
    • http://davidmillsengineering.com/uploads/1/3/1/4/131406321/gopowilul_gozuratup_pakalonikax.pdf
    • http://oleoleburritoexpress.com/uploads/1/3/0/6/130620443/2903633.pdf
    • http://ronaldvanderbijl.com/uploads/1/3/0/2/130274338/f8b493524dd187.pdf
    • http://startupkickbacks.com/uploads/1/3/1/6/131636839/vizum_rakurikulobis.pdf
    • http://darlingtreefarm.com/uploads/1/3/0/5/130589182/3290100.pdf
    • http://henrycavillfantasies.com/uploads/1/3/0/6/130604872/2288258.pdf
    • http://poweryogafestival.com/uploads/1/3/0/9/130969461/511c34a1.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_off000050bd.bin
b94d3975c485a383a354cfb9fab0e1dd3557b08819be05418f24ec61a1636d53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50BD 9508 bytes

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