Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf49e2f1df811cc2…

MALICIOUS

PDF

40.2 KB Created: 2020-06-17 04:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa14b6d4ba4a95a920427d04c20ce10f SHA-1: 9750867caeb72694e667b435f15993338954d9f4 SHA-256: cf49e2f1df811cc2bbc05b432b6caec20ca76f14d99682218765256a6fce4a89
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though partially corrupted, contains text related to 'Libros de harry potter en pdf' and references the wkhtmltopdf tool, suggesting a lure. The primary intent appears to be directing users to a network of linked PDF files hosted on various domains, likely for SEO manipulation or to serve as a distribution point for further malicious activity.

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://mail.johnsonscreations.com/uploads/1/3/0/6/130621179/130621179.html#libros+de+harry+potter+en+pdf
    • http://pratt.engineer/uploads/1/3/1/3/131381804/rudogufedir-zabefa-kepifupaw-besiwitowivib.pdf
    • http://mx.ashlynnsboutique.com/uploads/1/3/0/4/130436058/f50f9.pdf
    • http://newpaws.org/uploads/1/3/0/7/130740292/f3112908c85028.pdf
    • http://adultpleasuresparties.com.au/uploads/1/3/0/5/130551684/0ae9f75.pdf
    • http://dagamaformacion.com/uploads/1/3/0/7/130775244/gawawadobebate-venokegit-rijelos-vipuxute.pdf
    • http://santanarosewildsoul.com/uploads/1/3/0/3/130379326/fubipuxugijipajojo.pdf
    • http://craftyourvoice.com/uploads/1/3/1/3/131384484/3300333.pdf
    • http://skyhawk.ph/uploads/1/3/0/7/130775245/fejet.pdf
    • http://kameronchristian.com/uploads/1/3/0/2/130274279/9df0d94f.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d74.bin
422fbcd7cc5b7ce7fdf2f185ac4497b3b8932ec2440a820a7ea2332f90b100a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D74 5068 bytes
font_01_sfnt_off00006ea1.bin
590efd8453f37ae99182f1b3c0bd2cc320c20d730012b2a4089b1f93a12a8e4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA1 11200 bytes

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