Malicious PDF — malware analysis report

Static analysis result for SHA-256 49af3417ad1d602b…

MALICIOUS

PDF

46.4 KB Created: 2020-04-08 11:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a41fdf933151fe2a02027060267b22bd SHA-1: 1e089922c9ddde11adf7e3dee81934cfe13b3601 SHA-256: 49af3417ad1d602b949d3f6003c96917732be27820b87ec9245d5f918e9c84c9
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, many of which are SEO-optimized PDF files hosted on various domains. This pattern is indicative of a link farm designed to drive traffic, potentially to malicious websites or to inflate search engine rankings. The ML classifier strongly supports the malicious nature of this PDF.

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://bloomhw.com/uploads/1/3/0/7/130739629/130739629.html#mercedes+benz+c180+avantgarde+2013
    • http://nvuscosmetics.com/uploads/1/3/0/7/130738972/lezulodefamubijuf.pdf
    • http://jumpingpaws.net/uploads/1/3/0/7/130740089/mixupe.pdf
    • http://aghqllc.com/uploads/1/3/0/6/130620401/rupakufoge-binew.pdf
    • http://arteclara.com/uploads/1/3/1/3/131384568/muxobomaginotakisuxa.pdf
    • http://carlinclarke.com/uploads/1/3/1/3/131398004/dujeledogiwagow.pdf
    • http://healtohealproductions.com/uploads/1/3/0/6/130604056/bekikixa-fixol-tukudotumi.pdf
    • http://superunderdoggie.com/uploads/1/3/0/4/130483794/a47b7a09fbc59.pdf
    • http://kumuhokuakana.org/uploads/1/3/1/3/131383892/a7282e.pdf
    • http://infodeg.net/uploads/1/3/0/4/130477890/a0976647.pdf
    • http://spottyrain.com/uploads/1/3/1/1/131164569/waledamul.pdf
    • http://greenkwest.com/uploads/1/3/1/4/131407106/liwakimabef-baniropelasi.pdf
    • http://oceania28.ru/uploads/1/3/0/2/130291766/6053933.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_off00007617.bin
ee8f7b12495992c1bc2df5c0416455dd624f79cf0b397892dd200e068c80033f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7617 8592 bytes
font_01_sfnt_off000096f9.bin
45c39c4315a5d00962143d4102937301eb2649728d6de39b959633cfc30365c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96F9 16144 bytes

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