Malicious PDF — malware analysis report

Static analysis result for SHA-256 e566eabe68898560…

MALICIOUS

PDF

41.8 KB Created: 2020-04-03 15:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b1857c23da19880647fa90aa8cc529be SHA-1: 3807d4e9abd2f01d5116de2e414db4a51dc5f319 SHA-256: e566eabe68898560fa0e92ccfe91c4a67e7433fcbc7817d008585087150050a3
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links pointing to other PDF files across multiple domains, a technique often used for SEO manipulation or to distribute malware. The ML classifier strongly indicated maliciousness. No scripts were extracted, limiting the ability to determine specific payload delivery mechanisms.

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://multistreams.com/uploads/1/3/0/5/130544072/130544072.html#medidas+de+llaves+mm+a+pulgadas
    • http://bspetshop.com/uploads/1/3/0/2/130287548/gedewokidabenexuvi.pdf
    • http://pelabarba.com/uploads/1/3/0/6/130620948/vawomewik_wuwageku_banipewujidu_povuduxogojo.pdf
    • http://iotwstudio.org/uploads/1/3/0/5/130551247/betifetuxolixekumux.pdf
    • http://jrconsultores.org/uploads/1/3/0/2/130272319/radubeweji_bisuwexapesaku_bajevimifiki_xesedewus.pdf
    • http://tutorialesprouve.es/uploads/1/3/0/4/130435578/gilapewireliko.pdf
    • http://tru-thrift.com/uploads/1/3/0/5/130590374/juxomigofogomar-velewu-sanugumamotik-gifolulodulivag.pdf
    • http://studyspanishanywhere.com/uploads/1/3/0/3/130313356/4d62caaf9616b.pdf
    • http://dogwoodgrooming.com/uploads/1/3/0/6/130604203/4901649.pdf
    • http://maelasesethics.com/uploads/1/3/0/2/130274263/d032e0.pdf
    • http://andreapaoneofficial.com/uploads/1/3/0/5/130539492/78dae1.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_off00006692.bin
92361b2752661c89b56f66f8dcdd073d18d484b05e5824b30cb7950c5a2a827f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6692 7896 bytes
font_01_sfnt_off0000841d.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x841D 16036 bytes

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