Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afa03b204babc70…

MALICIOUS

PDF

42.9 KB Created: 2020-04-12 07:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b6187d67edd291151bc61399c40225a7 SHA-1: c2dfd31f0ef27a1f00efa76c3261f24e53162843 SHA-256: 4afa03b204babc70d598e157461448d9ed8f14949df6ded215b7ed9add80f08c
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to a link farm, likely for SEO poisoning or to host additional malicious content, as evidenced by the numerous URLs extracted.

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://myblackvotematters.com/uploads/1/3/0/6/130603958/130603958.html#palancas+de+primer+genero+en+el+cuerpo+humano+ejemplos
    • http://andrewcschaefer.com/uploads/1/3/1/3/131398521/sogemuferonabel.pdf
    • http://bookstarved.com/uploads/1/3/0/8/130813558/kedebo-vemijuruzugabi-viluvevalut.pdf
    • http://tagteamenterprisesllc.com/uploads/1/3/1/4/131453068/xitog.pdf
    • http://steinsmegamonstermeatbox.com/uploads/1/3/0/7/130739951/328806.pdf
    • http://anokacommunitymission.net/uploads/1/3/0/6/130639646/dutogaman.pdf
    • http://nortonelec.com/uploads/1/3/0/5/130550967/9727992.pdf
    • http://streetpartyrun.com/uploads/1/3/0/2/130289319/b5fbb95c46e.pdf
    • http://luxurydaytours.com/uploads/1/3/0/9/130968992/buwizebiwixakeb.pdf
    • http://crystalclearmemorybooth.com/uploads/1/3/0/9/130969761/6236620.pdf
    • http://languagesforallcorp.com/uploads/1/3/0/4/130436492/2110764.pdf
    • http://rebelliousnutrition.com/uploads/1/3/0/6/130639121/busofuna.pdf
    • http://sculpturetech.net/uploads/1/3/1/1/131163777/116408.pdf
    • http://test-lbe.com/uploads/1/3/0/7/130739922/9d1097258.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_off00007333.bin
17acf40c904727ebc0277a775ab28b0665686d96a667bc40db1aaad626dfb438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7333 1896 bytes
font_01_sfnt_off00007c05.bin
d3165c0b9beea45f0a1c822cc64cacd6c873c38281e983c4d9f5564e940609bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C05 9052 bytes

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