Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad89562c61827c06…

MALICIOUS

PDF

38.0 KB Created: 2020-03-19 06:09:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0656fae3aa8e22d8b69520f9b9e580ba SHA-1: a96818a6529fff305450bc793fc42b2b2d4547d7 SHA-256: ad89562c61827c06a1c96d0c8746a42f5fbe9b09a8ed7ba38401222f0900186c
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a URL that matches one of the extracted links. This suggests the primary function of this PDF is to act as a link farm, potentially for SEO manipulation or to distribute further malicious content via the numerous linked PDFs.

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://pameladirnberger.com/uploads/1/3/0/6/130639876/130639876.html#caracteristicas+de+la+escuela+de+la+teoria+de+los+sistemas
    • http://chenfamilyfoundation.org/uploads/1/3/0/6/130621124/lufixisexujudep-tonumet.pdf
    • http://idealmotorsny.com/uploads/1/3/0/5/130540420/noxoguxobuxuf.pdf
    • http://paulchow.net/uploads/1/3/0/5/130551864/zesovibiwan-vukisidobiruder-katotawo.pdf
    • http://www.harvardcases.com/uploads/1/3/0/2/130272080/6868527.pdf
    • http://www.drgregmaguire.com/uploads/1/3/0/9/130969370/378d70.pdf
    • http://hamiltonmanor.net/uploads/1/3/0/8/130814711/kujijewogi_poruwevoxife_demoru.pdf
    • http://thediscoverweekend.com/uploads/1/3/0/3/130323120/kumawa_fuxuxajoze_zaxirogiwe.pdf
    • http://the-healing-leaf.net/uploads/1/3/0/6/130621900/6510606.pdf
    • http://austinsbestbuys.com/uploads/1/3/0/4/130489051/gozizofapapodabi.pdf
    • http://www.tutoris-hk.com/uploads/1/3/0/7/130739712/fovexefagusib.pdf
    • http://www.utahacd.com/uploads/1/3/0/6/130620704/23d9730ae0.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_off00006b1d.bin
ade3517ec0a9497bcc410cd2be2bd8f35b03d975ced389c7d0882c4a941ca6e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1D 8040 bytes

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