Malicious PDF — malware analysis report

Static analysis result for SHA-256 de478127dc2f1aaf…

MALICIOUS

PDF

37.2 KB Created: 2020-03-27 03:48:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b4fcf74968283dbf6992f891b5e1ff7c SHA-1: 43a1676ab487ee475d9b06bfba72a151b03b2f90 SHA-256: de478127dc2f1aaf985613ab5ced51821a0eeb11016267c168c82fca8d3a3cb7
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on similar domains. The document body text, though partially corrupted, includes a reference to "clockwork princess audiobook download" and a URL that further supports this lure. The PDF_SEO_LINK_FARM heuristic indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to distribute malicious content. The ML_NYX_PDF_MALICIOUS score of 0.999991 strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://jackiefrankeditor.com/uploads/1/3/0/5/130588943/130588943.html#clockwork+princess+audiobook+download
    • http://slpresource.com/uploads/1/3/0/2/130271224/fugunezu.pdf
    • http://alohahairnmakeupbygg.com/uploads/1/3/0/2/130287997/mabate.pdf
    • http://mrspanglish.com/uploads/1/3/0/6/130603842/5905075.pdf
    • http://o2smallhouse.com/uploads/1/3/0/3/130313564/8175684.pdf
    • http://msjacques-purdysclassroom.com/uploads/1/3/0/3/130313156/6549692.pdf
    • http://lunarlogs.com/uploads/1/3/0/4/130489696/rajipi.pdf
    • http://markphe.com/uploads/1/3/0/6/130605280/filivab-pugofazejogow-wisuvujawod.pdf
    • http://mta-sts.mx.whitehorseranchvenue.com/uploads/1/3/0/2/130289458/puvib-ratopav.pdf
    • http://www.pearsongraphics.co.uk/uploads/1/3/0/4/130477090/moxuwikoxis-rakimatetonoji.pdf
    • http://calresrealty.com/uploads/1/3/0/5/130590219/7961810.pdf
    • http://mail.4frendzmeatmarket.com/uploads/1/3/0/6/130605493/rilarawusun.pdf
    • http://thompson.okanagan.com/uploads/1/3/0/4/130490399/zudetunu.pdf
    • http://stmargaretbiglake.com/uploads/1/3/0/4/130476359/suvonaka.pdf
    • http://graceischange.com/uploads/1/3/0/4/130477882/5372112.pdf
    • http://jmdetailingenterprise.com/uploads/1/3/0/6/130639885/mibowoge.pdf
    • http://downlinecheatsheet.com/uploads/1/3/0/3/130323374/vusipudo.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_off00006a18.bin
6364e15758aebc9538e11adfd4d09bd9de86d4f2de9d3795046c377fb36d9c2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A18 7492 bytes

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