Malicious PDF — malware analysis report

Static analysis result for SHA-256 0264008e813014c1…

MALICIOUS

PDF

17.5 KB Created: 2019-06-04 08:42:05 +01:00 Authoring application: mPDF 5.7
MD5: 0cafce10419c50dc67dd8645dcecf16a SHA-1: a9e688b47d70237ce5651f84a3b1c6fff97397c4 SHA-256: 0264008e813014c17a9b3d303b4dcdf5af1699f28d823708763e2730829daa1f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains a large number of embedded URLs, indicative of a link farm or redirection scheme. While the URLs themselves are currently flagged as benign, the sheer volume and the heuristic firing of 'PDF_SEO_LINK_FARM' suggest a malicious intent to manipulate search engine results or to lead users to potentially harmful content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9807

Heuristics 2

  • 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.
  • 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://cefasfese.4pu.com/2732732739734737/Rush-Hudson-Limbaugh-and-His-Times-Reflections-on-a-Life-Well-Lived-by-Rush-Limbaugh.pdf
    • http://cefasfese.4pu.com/1730731730735734/Rush-Revere-and-the-Star-Spangled-Banner-Adventures-of-Rush-Revere-4-by-Rush-Limbaugh.pdf
    • http://cefasfese.4pu.com/1730731735739738/Rush-Revere-and-the-American-Revolution-Adventures-of-Rush-Revere-3-by-Rush-Limbaugh.pdf
    • http://cefasfese.4pu.com/2732733732732732/The-Way-Things-Ought-to-Be-by-Rush-Limbaugh.pdf
    • http://cefasfese.4pu.com/2732737737731739/The-Assassination-of-Rush-Limbaugh-by-Tom-Layne.pdf
    • http://cefasfese.4pu.com/1733738732734739/Rush-Limbaugh-Is-a-Big-Fat-Idiot-And-Other-Observations-by-Al-Franken.pdf
    • http://cefasfese.4pu.com/1730730737732733/Adventures-of-Rush-Revere-1-3-Adventures-of-Rush-Revere-1-3-by-Rush-Limbaugh.pdf
    • http://cefasfese.4pu.com/4739736738737738/The-I-Hate-Ann-Coulter-Bill-O-Reilly-Rush-Limbaugh-Michael-Savage-Sean-Hannity-Reader-The-Hideous-Truth-about-America-s-Ugliest-Conservatives-by-Clint-Willis.pdf
    • http://cefasfese.4pu.com/7734733733733738/The-Historie-of-Frier-Rush-by-Friar-Rush.pdf
    • http://cefasfese.4pu.com/3736735738731739/Rush-of-Innocence-The-Rush-Series-1-by-L-R-Potter.pdf
    • http://cefasfese.4pu.com/1730737737734736735/The-Life-of-Jesus-of-Nazareth-A-Study-by-Benjamin-Rush-Rhees.pdf
    • http://cefasfese.4pu.com/3733736730730733/Mortals-by-Norman-Rush.pdf
    • http://cefasfese.4pu.com/3738730735731737/Rush-by-Jonathan-Friesen.pdf
    • http://cefasfese.4pu.com/3734739735732734/Rush-by-Beth-Yarnall.pdf
    • http://cefasfese.4pu.com/4734739736732733/The-Bum-s-Rush-Leo-Waterman-3-by-G-M-Ford.pdf
    • http://cefasfese.4pu.com/7733739732737/Mortals-by-Norman-Rush.pdf
    • http://cefasfese.4pu.com/7735730730734/Such-a-Rush-by-Jennifer-Echols.pdf
    • http://cefasfese.4pu.com/2735734730738734/A-Rush-to-Violence-by-Christopher-Smith.pdf
    • http://cefasfese.4pu.com/3738738730736737/Awaited-Wasteland-2-by-Lynn-Rush.pdf
    • http://cefasfese.4pu.com/2736733734732737/Gold-Rush-2000-by-Ed-Mitchell.pdf

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