Malicious PDF — malware analysis report

Static analysis result for SHA-256 efefbf82c4c03c81…

MALICIOUS

PDF

13.8 KB Created: 2019-05-07 09:14:04 +01:00 Authoring application: mPDF 5.7
MD5: cd106d1848d3dd56adcacbd2f32bca4d SHA-1: 6a5e5a757d9be0a91846a964f7a424698abaa1cc SHA-256: efefbf82c4c03c81c86fd0fc73f599037f07a4722d780affe275e98ea0f47ae5
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. The embedded URLs, while currently marked as benign, are likely used to distribute further malicious content or for SEO spam. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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://loaminoo.linkpc.net/3096095091094091/Blood-Witch-Blood-Canticles-1-by-Naomi-Clark.pdf
    • http://loaminoo.linkpc.net/4093098096096090/Lucifer-s-Ark-by-Simon-Clark.pdf
    • http://loaminoo.linkpc.net/3097098097097095/In-This-Skin-by-Simon-Clark.pdf
    • http://loaminoo.linkpc.net/9095097094093/The-Night-of-the-Triffids-by-Simon-Clark.pdf
    • http://loaminoo.linkpc.net/1093092094091097/This-Rage-Of-Echoes-by-Simon-Clark.pdf
    • http://loaminoo.linkpc.net/9095097091096/Humpty-s-Bones-by-Simon-Clark.pdf
    • http://loaminoo.linkpc.net/9095099097098/Stone-Cold-Calling-by-Simon-Clark.pdf
    • http://loaminoo.linkpc.net/1092097094098098/Milk-Blood-by-Adrian-Simon.pdf
    • http://loaminoo.linkpc.net/3092092092/Blood-Defense-Samantha-Brinkman-1-by-Marcia-Clark.pdf
    • http://loaminoo.linkpc.net/6095090099093097/Blood-Enemy-Invader-2-by-Simon-Scarrow.pdf
    • http://loaminoo.linkpc.net/1094094099092099/Some-Sort-of-Crazy-Happy-Crazy-Love-2-by-Melanie-Harlow.pdf
    • http://loaminoo.linkpc.net/3092096095096098/Crazy-For-The-Cowboy-Love-at-the-Crazy-H-2-by-Cindy-Spencer-Pape.pdf
    • http://loaminoo.linkpc.net/2092095095095096/Kissing-Her-Crazy-Crazy-Love-2-by-Kira-Archer.pdf
    • http://loaminoo.linkpc.net/1091092095097095090/Crazy-Crazy-Ella-in-Love-1-by-Eve-Langlais.pdf
    • http://loaminoo.linkpc.net/2091097091098092/What-Looks-Like-Crazy-Crazy-1-by-Charlotte-Hughes.pdf
    • http://loaminoo.linkpc.net/2092094097097090/Father-Son-and-Constitution-How-Justice-Tom-Clark-and-Attorney-General-Ramsey-Clark-Shaped-American-Democracy-by-Alexander-Wohl.pdf
    • http://loaminoo.linkpc.net/6098091099091095/The-Classic-Clark-Collection-by-Mary-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/9095098093093/Crazy-Maybe-Crazy-1-by-A-D-Justice.pdf
    • http://loaminoo.linkpc.net/3091096095093092/Crazy-Maybe-Crazy-1-by-A-D-Justice.pdf
    • http://loaminoo.linkpc.net/5091097092093/Crazy-Good-Crazy-Good-1-by-Rachel-Robinson.pdf
    • http://loaminoo.linkpc.net/2091097091098092/What-Looks-Like-Crazy-Crazy-1-by-Charlotte-Hughes

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