Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5cb47718ad60fd8…

MALICIOUS

PDF

35.6 KB Created: 2020-05-19 23:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a79e02c3529f9102f9e184d3fa97e0a6 SHA-1: 327e72b503b5b3eab5090952a73be6d4be8e403d SHA-256: e5cb47718ad60fd8a96c9e8c0f2c4af4bef20636cf53b2f5825484165bbc166d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links to various domains, many of which are structured to appear as downloadable PDF files. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass linking of external PDFs, suggesting a link farm or redirection mechanism. The embedded URLs likely lead to malicious content or phishing pages. No scripts were extracted, but the PDF structure and link farm heuristic strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://kyflowernseed.com/uploads/1/3/1/3/131382113/131382113.html#how+children.+develop+4th+ed+pdf
    • http://loyaltybailbonds.net/uploads/1/3/0/5/130589285/f795ae6a1.pdf
    • http://skyfootgoddess.com/uploads/1/3/1/3/131383674/544311.pdf
    • http://crmi-online.com/uploads/1/3/1/4/131453374/vewisobemunolepe.pdf
    • http://alexandergreentranslations.com/uploads/1/3/1/6/131607203/xozutinesolawatotexe.pdf
    • http://sugarpaso.com/uploads/1/3/0/8/130813357/bagipabaf.pdf
    • http://trainlikedren.com/uploads/1/3/0/5/130588347/1978686.pdf
    • http://psaudioproductions.com/uploads/1/3/1/6/131606819/vinixuvewunim_fukup_rijaw.pdf
    • http://donohoearchitects.net/uploads/1/3/0/7/130739308/nasozufatopim.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_off00006094.bin
4c3a72f21007a607c3eb65ca937ebd6144db43eb03565312e65c29d7df5b0557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6094 10236 bytes

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