Malicious PDF — malware analysis report

Static analysis result for SHA-256 191235e89c78f406…

MALICIOUS

PDF

136.0 KB Created: 2020-03-08 07:20:58 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e0572a513cf9a95db4301c5df902af35 SHA-1: c2533f2bdf00eda734f41b9866e792937e7d0d07 SHA-256: 191235e89c78f4063e7907de1d5c911036a6d711efaf8ca63fca39a54d37c40a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The document body, though partially corrupted, contains a URL related to a 'nuclear chernobyl video', likely a lure to entice users to click on the numerous external links. No scripts were extracted from this sample, but the sheer volume of links points towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://qcukm.bpmtc.com/uploads/1/3/0/6/130605238/130605238.html#accidente+nuclear+chernobyl+video
    • http://internshipessentials.com/uploads/1/3/0/5/130588258/1038431.pdf
    • http://lifeofche.com/uploads/1/3/0/6/130639892/wasebivugibat-kukeke.pdf
    • http://www.cryptotalkllc.com/uploads/1/3/0/4/130489275/liwapanu.pdf
    • http://aascustomjeep.com/uploads/1/3/0/2/130270894/zivivexuwunoza.pdf
    • http://landlordcircle.co.uk/uploads/1/3/0/5/130543280/8318537.pdf
    • http://www.pure-science-fiction.com/uploads/1/3/0/6/130603942/543df5b6013c.pdf
    • http://vikinggirlllc.com/uploads/1/3/0/6/130639945/a00596ae028703.pdf
    • http://nu1912.org/uploads/1/3/0/7/130775630/d634ce8.pdf
    • http://north-shore-aerial-imaging.com/uploads/1/3/0/2/130270986/senemewadekim_misozoxivekigu_fakofotoj_zutuvaj.pdf
    • http://scientificdirections.com/uploads/1/3/0/2/130272071/9702007.pdf
    • http://ambitwinteam.com/uploads/1/3/0/5/130551653/pekozusidij_ruvapezila.pdf
    • http://help-hope-geo.org/uploads/1/3/0/6/130603903/pinibafot.pdf
    • http://prinkcases.com/uploads/1/3/0/6/130640141/b059c8bcf.pdf
    • http://usafachapters.org/uploads/1/3/0/7/130738639/437467.pdf
    • http://elpcarpetcleaners.com/uploads/1/3/0/7/130739693/melogeg.pdf
    • http://e-bikereports.com/uploads/1/3/0/5/130551160/58376ce682b0a.pdf
    • http://www.dixhillsroofing.com/uploads/1/3/0/4/130488875/d2081e59.pdf
    • http://westerncanadaleather.com/uploads/1/3/0/7/130738973/gasapuguvamalam.pdf
    • http://baynationhomehealth.com/uploads/1/3/0/4/130476205/vevoxagabalu-wimod-seloraguforoxos-tuzokotidodutoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c12e.bin
55c134d302e53f5a95c48fa8bedc641a6dccc5d43fdeb18ee20dbf7347a299dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C12E 15000 bytes
font_01_sfnt_off0001f0a1.bin
4cda5f785b161ab6df9682e6368fd2c101e9aa902a3f31947a361fc50cf1a95c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F0A1 2732 bytes
font_02_sfnt_off0001fa58.bin
81c4871addf27e87acfbaa69c2c466c3d750b4e76749e4ad31e66a8c81c9d3de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA58 16076 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.