Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0a63f787e042ea…

MALICIOUS

PDF

35.9 KB Created: 2020-05-30 03:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b189ae03b14aeccd9b38d5f5e4321f50 SHA-1: e1a819c451ac8f9de3e6d5ec068a235e3cf058ce SHA-256: 5a0a63f787e042eaf9fbc02311e4617e42a8a3452d03ffc3a714acec0bb4411d
92 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. These links point to various PDF files hosted on unrelated domains, suggesting a link farm or distribution network. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent. The document body itself is heavily obfuscated but contains some of the same URLs, reinforcing the link farm pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://foodintraining.net/uploads/1/3/0/7/130739936/130739936.html#los+arcanos+de+thoth
    • http://moringanutritionals.com/uploads/1/3/1/4/131409841/lofakoduruzojo_surazepaviveb_rewagogoxibo.pdf
    • http://worldofmarbles.com.au/uploads/1/3/0/2/130287495/237658d1150.pdf
    • http://clearvoice-usa.com/uploads/1/3/0/5/130551775/8081094.pdf
    • http://makerstrong.com/uploads/1/3/0/6/130639539/6c1bb8e4561c8.pdf
    • http://justtaxit.net/uploads/1/3/1/3/131383476/bujigawikasevum-nekuninimo.pdf
    • http://backinmackin.com/uploads/1/3/0/7/130775680/juvolipobexeged_domoz.pdf
    • http://motorcityrefinishing.com/uploads/1/3/0/4/130478163/vevumagixogusujub.pdf
    • http://embraceanyfuture.com/uploads/1/3/0/2/130288430/1131611.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_off00005ef4.bin
7023954ef78d7ba6db58a6a653ccf5b386313e4c60b6a8047578199b8044840c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF4 11076 bytes

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