Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6459b82962028c9…

MALICIOUS

PDF

33.2 KB Created: 2020-05-22 11:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28949a8b4beb187624d04b5f885302c1 SHA-1: 2743496bce24f6070510d92c121e341596860cb6 SHA-256: e6459b82962028c9cbb9e3b702ba8934fe686d3d1aa70211672ea59e77402322
96 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. The embedded document body text, though partially corrupted, also contains URLs. These links likely serve as a distribution mechanism for further malicious content or for SEO manipulation. The ML_NYX_PDF_MALICIOUS heuristic strongly indicates malicious intent.

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://9zfo.brdge.org/uploads/1/3/1/8/131872225/131872225.html#oziris+ironman+guide+reddit
    • http://harrymassageoz.com/uploads/1/3/0/8/130874148/4332b53b25.pdf
    • http://jaketaz.net/uploads/1/3/0/2/130287493/5294658.pdf
    • http://v-i.biz/uploads/1/3/0/4/130478868/rumeduzo_mapejepewofel_wabelovusote.pdf
    • http://wefixwrecks.com/uploads/1/3/0/5/130550949/2224374.pdf
    • http://nixunger.com/uploads/1/3/0/6/130621636/9527771.pdf
    • http://jjroofingconstruction.net/uploads/1/3/0/5/130588543/rinaga.pdf
    • http://sbcrgroup.com/uploads/1/3/0/2/130289553/1675264.pdf
    • http://markrdahl.com/uploads/1/3/0/9/130969153/6873335.pdf
    • http://savinsys.com/uploads/1/3/0/9/130969414/nefixoxi_zedunuzitel_lawosesuwipi_jidize.pdf
    • http://date-master.com/uploads/1/3/0/6/130620910/a38945.pdf
    • http://littyo.com/uploads/1/3/0/6/130604956/nifobanujujafot.pdf
    • http://nd-agency-london.com/uploads/1/3/0/6/130621928/zejoxul.pdf
    • http://activepropertyfinance.com/uploads/1/3/1/3/131379591/zidinadoja.pdf
    • http://directcarenepal.org/uploads/1/3/0/2/130288630/56d7fadaf7.pdf
    • http://danasperuvisit.com/uploads/1/3/1/4/131412491/nafemuko-rufedomavuke-midekapumopo.pdf
    • http://issakasoccerfootball.com/uploads/1/3/0/8/130874247/vuxerevuput.pdf
    • http://savormendocino.com/uploads/1/3/1/6/131606212/7992162.pdf
    • http://eventsatashleyfarm.com/uploads/1/3/0/5/130590700/tatew.pdf
    • http://tusotolifestyle.com/uploads/1/3/0/5/130590243/47428.pdf
    • http://southernbella.net/uploads/1/3/0/6/130604458/ginadikumot.pdf
    • http://eichon.co/uploads/1/3/0/5/130539672/4882931.pdf
    • http://wolfmoon.farm/uploads/1/3/0/4/130483949/2175290.pdf
    • http://cvolierborgerhout.com/uploads/1/3/1/4/131408033/gawagi.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_off00005649.bin
092703e40247f5c7a7e4468ab5883b81f01dbb98a703dd9fe3f2c9c25706d8ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x5649 10044 bytes