Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39b3ecf6ad60a60…

MALICIOUS

PDF

36.6 KB Created: 2020-04-08 10:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 93f94dbaa9bfef67871ef93de8d50422 SHA-1: 31b2581490384a90feb60fa4fb310dbdd0e3709f SHA-256: d39b3ecf6ad60a60aa403a1db383ae5aec1b1a02c98ebc8096cda47941322fa8
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to uniquely named PDF files on various domains. This pattern is indicative of a link farm or SEO poisoning technique designed to drive traffic to potentially malicious sites. The document body contains garbled text and a reference to a URL that appears to be part of this link farm.

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://sherumsit.org/uploads/1/3/0/6/130639513/130639513.html#how+to+set+alarm+baby+g+watch
    • http://rrothart.com/uploads/1/3/0/4/130488839/xegaru.pdf
    • http://pinehillscamp.org/uploads/1/3/0/6/130639720/2478ba65.pdf
    • http://rd207.com/uploads/1/3/1/3/131381675/sinapisevubas-fugufupufaguju-virafefasapup-vojobefigotenow.pdf
    • http://herefordbeds.com/uploads/1/3/0/7/130776682/9116816.pdf
    • http://artfulconnections.net/uploads/1/3/0/7/130739197/fubidurexobone_koliliw_bawobafuvolanuw.pdf
    • http://bluethumbaps.com/uploads/1/3/1/3/131384229/4f7af45210.pdf
    • http://heatherlabbe.com/uploads/1/3/0/6/130621294/pisasu-fapuwiwobagoju-bizevab-lejuzajepawav.pdf
    • http://seaceoschool.com/uploads/1/3/0/7/130739742/koranuxire.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_off00006610.bin
731b26436e16984f95785297cf66b72174d585453147252cb1db4f33792e505f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6610 8204 bytes

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