Malicious PDF — malware analysis report

Static analysis result for SHA-256 209a94b94a3fbba1…

MALICIOUS

PDF

36.8 KB Created: 2020-04-01 18:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fd19a076b245e36868e13b3be6174d7b SHA-1: 9250ebdbde848e5501ea675d2a58632e8a6579fd SHA-256: 209a94b94a3fbba12743859b2ae14357b8f9ac76592922c51433304d1028b4b1
94 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, pointing to various PDF documents on different domains. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be to create a link farm, potentially for SEO manipulation or to distribute further malicious content through the linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ez360apps.com/uploads/1/3/0/5/130540683/130540683.html#propiedades+de+lipidos+saponificables
    • http://momentumwomenscenter.com/uploads/1/3/1/0/131070301/pasewi.pdf
    • http://myplanetvapor.com/uploads/1/3/0/6/130639298/fuxilenigoz.pdf
    • http://margothpro.com/uploads/1/3/0/7/130775817/6720250.pdf
    • http://rygowellness.com/uploads/1/3/0/6/130639270/e189f3cd.pdf
    • http://gettheirname.com/uploads/1/3/0/6/130620813/142566.pdf
    • http://gallaghertranslations.com/uploads/1/3/0/4/130483244/3847df.pdf
    • http://jendaperla.com/uploads/1/3/0/7/130775822/dedagemolimaleg.pdf
    • http://poliotoolkit.org/uploads/1/3/0/5/130589374/6047999.pdf
    • http://mylifeyourlifeourlives.org/uploads/1/3/0/6/130639593/4647326.pdf
    • http://vbmhome.com/uploads/1/3/0/6/130639337/02b801b7.pdf
    • http://miacarterbooks.com/uploads/1/3/0/5/130542870/jiroxasemeb.pdf
    • http://southlandsbarns.com/uploads/1/3/0/6/130620662/vibepidazizivige.pdf
    • http://miameicreations.com/uploads/1/3/1/3/131383228/c3cad49e.pdf
    • http://loseweightwithsurgery.com/uploads/1/3/0/4/130483924/lezomuse_kevigoxur.pdf
    • http://mihomeambassador.com/uploads/1/3/0/7/130775792/vovatoxege.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_off00006817.bin
3e1b937ee060ff342e0b727716db08097ee4aa7b766f65e41ff513a24d1c5c27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6817 7600 bytes

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