Malicious PDF — malware analysis report

Static analysis result for SHA-256 68cb74abb353d3b7…

MALICIOUS

PDF

35.5 KB Created: 2020-06-04 06:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0f3a106f7b9a1ec561ba6ccfe8da8cf SHA-1: 2e27e3d39b11caeef505b1119d9105e06eec531e SHA-256: 68cb74abb353d3b77482b91f1b5a62515f694e7b20346de5ed998d1835857768
104 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The presence of a 'download' lure and the ML_NYX_PDF_MALICIOUS firing further indicate malicious intent. The document likely aims to trick users into visiting malicious sites or downloading further malware, although no specific payload delivery mechanism was directly observed within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://rentsnowshoemountain.com/uploads/1/3/0/6/130640019/130640019.html#logitech+c525+software+download
    • http://movingcompanyokc.com/uploads/1/3/0/8/130814124/4835432.pdf
    • http://vanessavalenciahealing.com/uploads/1/3/1/4/131407836/zujoxijamaza.pdf
    • http://hostmaster.westonmusic.co.uk/uploads/1/3/0/2/130289322/7403bd4.pdf
    • http://simplyjesusradio.org/uploads/1/3/1/3/131398350/9317054.pdf
    • http://booksbybrucepierce.com/uploads/1/3/1/4/131413550/5852284.pdf
    • http://icjewelersonline.com/uploads/1/3/0/5/130590478/1921189.pdf
    • http://karenreber.com/uploads/1/3/1/8/131858916/5898390.pdf
    • http://rentsnowshoemountain.com/uploads/1/3/0/6/130640019/terms.html
    • http://rentsnowshoemountain.com/uploads/1/3/0/6/130640019/dmca.html
    • http://rentsnowshoemountain.com/uploads/1/3/0/6/130640019/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dikezupasugi969636206.files.wordpress.com/2020/06/witotomipavizemajopoze.pdf
    • https://zivokot.files.wordpress.com/2020/06/regezawiwupopoxitinife.pdf
    • https://ragupawagev.files.wordpress.com/2020/06/sivux.pdf
    • https://wegekivosum.files.wordpress.com/2020/06/98864579771.pdf
    • https://nuguvatun.files.wordpress.com/2020/06/lakigar.pdf
    • https://kifukixu.files.wordpress.com/2020/06/58563090432.pdf
    • https://zozijonatoto.files.wordpress.com/2020/06/27421163236.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006080.bin
ad69564c2ebd4ac274a940b4efd3d40608a7f78b9e3009b876dc3f23368f89f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6080 10028 bytes