Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1982a0f2f2edd2b…

MALICIOUS

PDF

41.1 KB Created: 2020-03-30 05:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bc59c00ec957c9dec18cb4038861db2a SHA-1: a6c82727b35bbcd550ba65e5e8c98ee65365a94d SHA-256: f1982a0f2f2edd2ba6d549c230ba1d1992079a26ba7f320906dc7713faaa8772
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains text related to coloring pages, which is likely a lure to disguise the malicious nature of the links. The primary purpose appears to be directing users to a network of external sites, potentially for SEO spam or to host further malicious content.

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://socalasta.voyagerwebsites.com/uploads/1/3/0/7/130775164/130775164.html#imagenes+de+palabras+con+g%C3%BCe+y+g%C3%BCi+para+colorear
    • http://mail.artofmurf.com/uploads/1/3/0/7/130740260/salanewekesupumup.pdf
    • http://hogsandairdogs.com/uploads/1/3/0/9/130969932/6103601.pdf
    • http://danceswithcranes.com/uploads/1/3/0/4/130494172/746e3c1edebc.pdf
    • http://azyshopping.com/uploads/1/3/0/5/130551256/fubujedapaxa.pdf
    • http://californiaspac.com/uploads/1/3/0/8/130813957/lirezalewavim.pdf
    • http://heldeskshare.com/uploads/1/3/0/2/130287493/3ab2b843244.pdf
    • http://claymermaid.com/uploads/1/3/0/2/130289772/rozapelinigeba.pdf
    • http://rooftoplocalhoney.com/uploads/1/3/0/9/130969057/xamalunudupojef-nivomugodum.pdf
    • http://pchelpnsupport.com/uploads/1/3/0/8/130874380/tuwulexu-wejepekagavup-bepikow.pdf
    • http://rockingtheboat.net/uploads/1/3/0/6/130620955/2583401.pdf
    • http://exceptionalgeeks.com/uploads/1/3/0/6/130620492/2562538.pdf
    • http://medwaybaptist.com/uploads/1/3/0/9/130969200/4986522.pdf
    • http://sierrasun.ca/uploads/1/3/0/6/130639540/3549811.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_off00005f46.bin
10b73032924fa16618f03bb306c9d4e893fc2ea052b9e6efbef5f1a96f305bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F46 8944 bytes
font_01_sfnt_off00007f72.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F72 16036 bytes

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