Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d45f61e655a894…

MALICIOUS

PDF

28.5 KB Created: 2020-06-10 04:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a343997ddbd6d0171d2379042cf68563 SHA-1: 59fcaee874c0c4780b899082d02f4d05ab54e392 SHA-256: a6d45f61e655a8943f1f4214b3787f0fd5625573d560af51209f2d382a247fc3
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to uniquely named PDF files on newly registered domains. This pattern is indicative of a link farm or SEO poisoning attack, likely intended to direct users to malicious content or phishing pages. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://rootsraizesbrasileiras.com/uploads/1/3/0/5/130543402/130543402.html#realidades+3+capitulo+10+answers
    • http://74-123-77-47.mgwnet.com/uploads/1/3/0/7/130739222/ruwipemufi.pdf
    • http://inspire-mindbodyspirit.com/uploads/1/3/0/3/130313113/fomelo_sopikepixibinog_wuvamukaronased_tupuliza.pdf
    • http://test.scotmailing.com/uploads/1/3/0/6/130603979/xikiko.pdf
    • http://thetallestevergreen.com/uploads/1/3/0/4/130488223/51cfca40c6e4.pdf
    • http://genecoproperties.com/uploads/1/3/0/5/130545096/b3801cb70.pdf
    • https://ragogudulamu.files.wordpress.com/2020/06/tilefula.pdf
    • https://lareberu519560336.files.wordpress.com/2020/06/minevabefasaj.pdf
    • https://gamumibas.files.wordpress.com/2020/06/52139314767.pdf
    • https://fusimutu.files.wordpress.com/2020/06/45364003115.pdf
    • https://rafuzakaxoru.files.wordpress.com/2020/06/13050899114.pdf
    • https://rimivokexeta.files.wordpress.com/2020/06/79753218683.pdf
    • https://losimabo.files.wordpress.com/2020/06/kozobekovuvaxafaparutax.pdf
    • https://vaxogesazefo.files.wordpress.com/2020/06/3484186718.pdf
    • https://zulirekenix.files.wordpress.com/2020/06/85592307874.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_off0000479c.bin
c20e0a2fe4cd3ff5e6d81c24c59d6d7f82d5b9d24b5933436845dc4a6adaeb8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x479C 8528 bytes

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