Malicious PDF — malware analysis report

Static analysis result for SHA-256 7687b341b6bdad85…

MALICIOUS

PDF

13.5 KB Created: 2019-04-30 11:20:30 +01:00 Authoring application: mPDF 5.7
MD5: e412289e3c30f1898d40bf00bb83efd1 SHA-1: 5a63cd5350d5f6516d59fcea3b4520cc87edc6a0 SHA-256: 7687b341b6bdad85b580d0cf14764b088a9d5fac8e211431e9989e2869b3c51f
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. While the URLs themselves are currently marked as benign, the sheer volume and structure suggest a malicious intent, possibly for SEO manipulation or to distribute further malware. The ML_NYX_PDF_MALICIOUS classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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/2095091095092092/In-the-Dark-Places-Inspector-Banks-22-by-Peter-Robinson.pdf
    • http://loaminoo.linkpc.net/2096098092090093/Watching-the-Dark-Inspector-Banks-20-by-Peter-Robinson.pdf
    • http://loaminoo.linkpc.net/4098094099094093/Bad-Boy-Inspector-Banks-19-by-Peter-Robinson.pdf
    • http://loaminoo.linkpc.net/8098092098098/When-the-Music-s-Over-Inspector-Banks-23-by-Peter-Robinson.pdf
    • http://loaminoo.linkpc.net/8093095092091/Strange-Affair-Inspector-Banks-15-by-Peter-Robinson.pdf
    • http://loaminoo.linkpc.net/5090094095096097/Children-of-the-Revolution-Inspector-Banks-21-by-Peter-Robinson.pdf
    • http://loaminoo.linkpc.net/2099092093093092/Conquer-the-Dark-by-L-A-Banks.pdf
    • http://loaminoo.linkpc.net/1094094096093095/Dark-Places-by-Jon-Evans.pdf
    • http://loaminoo.linkpc.net/1093092094095091/Against-a-Dark-Background-by-Iain-M-Banks.pdf
    • http://loaminoo.linkpc.net/3091097093099093/Dark-Places-by-Kate-Grenville.pdf
    • http://loaminoo.linkpc.net/6090097091093/Dark-Places-by-Gillian-Flynn.pdf
    • http://loaminoo.linkpc.net/3093090090092/Dark-Places-by-Gillian-Flynn.pdf
    • http://loaminoo.linkpc.net/1096096097098094/Dark-Places-by-Krista-Cairn.pdf
    • http://loaminoo.linkpc.net/8097097098097/Dark-Places-by-Gillian-Flynn.pdf
    • http://loaminoo.linkpc.net/1097095090091097/Dark-Places-by-Gillian-Flynn.pdf
    • http://loaminoo.linkpc.net/4098094094090098/A-Necessary-End-by-Peter-Robinson.pdf
    • http://loaminoo.linkpc.net/1090095096097099/Death-in-the-Silent-Places-by-Peter-Hathaway-Capstick.pdf
    • http://loaminoo.linkpc.net/9099095096096096/An-inspector-stalls-by-Peter-Aveyard.pdf
    • http://loaminoo.linkpc.net/1092094099090093/The-False-Inspector-Dew-by-Peter-Lovesey.pdf
    • http://loaminoo.linkpc.net/2098093092092094/Tall-Dark-amp-Royal-Dynasties-The-Connellys-1-by-Leanne-Banks.pdf
    • http://loaminoo.linkpc.net/1096096097098094/Dark-Pla

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