Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed713728cec75a0…

MALICIOUS

PDF

41.6 KB Created: 2020-04-05 02:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 988bbec611680aff86d35796faac48a6 SHA-1: 1c5e73a0127ac8d991842038820d56387b069dfb SHA-256: aed713728cec75a09d17a213605042730eac408f85b70be4d6b1e80856ecd639
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO spamming operation. The ML classifier strongly flagged this PDF as malicious. The document body contains garbled text but includes a reference to the primary URL, suggesting the intent is to redirect users to a network of potentially malicious or spam-related content.

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://mivecindad.net/uploads/1/3/0/4/130490338/130490338.html#caracteristicas+principales+de+los+algoritmos+en+informatica
    • http://bayarealeatherpride.com/uploads/1/3/0/5/130543028/175cf81a0c786.pdf
    • http://craigslistfoundation.com/uploads/1/3/0/8/130873712/nomawopeb.pdf
    • http://sgprivateye.com/uploads/1/3/0/7/130776269/vuramobomu_tumezux.pdf
    • http://woodhavenlane.com/uploads/1/3/0/2/130289541/fibedawa_jabewufu.pdf
    • http://generatingsmiles.com/uploads/1/3/0/7/130776810/5326853.pdf
    • http://myedtech.studio/uploads/1/3/0/5/130588633/mobebugixi.pdf
    • http://lesbontemps2016.com/uploads/1/3/1/0/131069843/4881343.pdf
    • http://elementhomeaudio.com/uploads/1/3/0/6/130603725/fuxezerasixexan.pdf
    • http://expansionbuilder.com/uploads/1/3/1/4/131438876/beruwudiv.pdf
    • http://janeyogaweb.com/uploads/1/3/0/5/130588640/denagafijiromexa.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_off000076fe.bin
7eafe5334f95f73bd25b0001de39d1a70196a0ea785534a40904b3eafaa9fbbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76FE 8868 bytes

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