Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a966dc88375a68e…

MALICIOUS

PDF

38.4 KB Created: 2020-06-05 01:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ffa3eaa9ef7b656ed6217876df3b65f SHA-1: 96294dc4a90b47855511f26ca4b2068b235b490e SHA-256: 4a966dc88375a68eae9d07e1551e248274043e569a426cbb6cd78d81c0b8e95c
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. These links point to various domains, many of which appear to be part of a link farm. The embedded URLs suggest a tactic to manipulate search engine results or to redirect users to potentially malicious content. No scripts were extracted from this sample, limiting the analysis of direct payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://musepop.us/uploads/1/3/1/1/131164211/131164211.html#real+sat+december+2016+answers
    • http://majesticvacationadventures.com/uploads/1/3/0/5/130543070/7093682.pdf
    • http://triuneuae.com/uploads/1/3/0/6/130621789/mepinaleb.pdf
    • http://ledbase.org/uploads/1/3/0/6/130639317/774868.pdf
    • http://jbmichaellaw.com/uploads/1/3/0/3/130323789/mesog.pdf
    • http://socialbari.net/uploads/1/3/1/8/131857334/2555975.pdf
    • http://aiasciencemagazine.com/uploads/1/3/0/6/130622022/9296401.pdf
    • http://lynda-fletcher.com/uploads/1/3/1/4/131437130/842201.pdf
    • http://glassa.se/uploads/1/3/0/9/130969340/6b9e999020ef.pdf
    • http://unapologeticglow.com/uploads/1/3/0/9/130969973/4069728.pdf
    • http://musepop.us/uploads/1/3/1/1/131164211/terms.html
    • http://musepop.us/uploads/1/3/1/1/131164211/dmca.html
    • http://musepop.us/uploads/1/3/1/1/131164211/policy.html
    • https://baxedul.files.wordpress.com/2020/06/mevug.pdf
    • https://lilimiweko.files.wordpress.com/2020/06/kevigafusorawonowatetusub.pdf
    • https://bazolexadole.files.wordpress.com/2020/06/duvowemuruzatuju.pdf
    • https://jedadedax605715953.files.wordpress.com/2020/06/nozatojumenexenulolen.pdf
    • https://defamufomowa.files.wordpress.com/2020/06/telurewos.pdf
    • https://jerurig.files.wordpress.com/2020/06/18361864938.pdf
    • https://waluvap.files.wordpress.com/2020/06/28782220816.pdf
    • https://pivowosisigo.files.wordpress.com/2020/06/98004419366.pdf
    • https://megaxosu.files.wordpress.com/2020/06/38987871077.pdf
    • https://jagunijo.files.wordpress.com/2020/06/segixetodovawo.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_off000068d7.bin
40e1d5ab686be127b16ec8eab452e208b090dc29ed77ca7673d3af3b6378a70c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D7 10892 bytes

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